Again, in real life, we perform different actions depending upon the outcome of different conditions. If ELSE is not present and Case_Expression matches with none of the values, then. THEN ACT union all The searched CASE expression evaluates a set of Boolean expressions to determine the result. LearnSQL.com is an online platform designed to help you master SQL. If you dont want all columns and only want the results of the two CASE statements, then you can remove the *. Is it correct to use "the" before "materials used in making buildings are"? Asking for help, clarification, or responding to other answers. and exists (select x from CELL_STATES cs where cs.cell_id=g.cell_id Is thatconnected with comparisson signs (=, ) or with CASE expresions types( SIMPLEvs.SEARCHED )? We need to make an alias of the subquery because a query needs a table object which we will get from making an alias for the subquery. Within a SELECT statement, a simple CASE expression allows for only an equality check; no other comparisons are made. Race. ON SUBSTRING(STPR_STATUSES.STUDENT_PROGRAMS_ID, 1, 7) = (MILITARY_ASSOC.ID) Its not procedural. ) FROM ( If you want to know more, just leave a comment below. Below is the example MS-SQL code: In the above example CASE is used in the UPDATE statement. You made it make sense. Thanks, If there is no ELSE part and no conditions are true, it returns NULL. I have some difficult code that I have inherited and has terrible performance time. condN: A BOOLEAN expression. Good question. Im trying to define my WHEN statements by pulling a value from another table using a nested select top 1 statement, and if the value selected is not null then give me my original select, if it is null and another value from the same table is not null then give me hard value else other hard value. This Values: Value_1, Value_2 Are compared with single CASE_Expression sequentially. Connect and share knowledge within a single location that is structured and easy to search. SQL Server allows for only 10 levels of nesting in CASE expressions. I'm just looking conceptually at referencing the CASE statement in the SELECT clause somewhere in the WHERE clause, or vice versa. If nothing matched, then control goes to ELSE statement, and Statement_Else will get executed. The CASE statement goes through conditions and returns a value when the first condition is met (like an if-then-else statement). CASE your_case_criteria AS prod WHEN MILITARY_STATUSES (ACG,DODCG,FAMCG,RCG,VCG) The answer is that it stops after the first match. For more information, please see our The following example uses the CASE expression to change the display of product line categories to make them more understandable. Margaret. However, a couple of functions come close. Let's do a bit of different analysis on these data. User-864238592 posted. The following example uses the CASE expression in a SET statement in the table-valued function dbo.GetContactInfo. END AS TELEFONO. The nature of simulating nature: A Q&A with IBM Quantum researcher Dr. Jamie We've added a "Necessary cookies only" option to the cookie consent popup. Replacing broken pins/legs on a DIP IC package, Calculating probabilities from d6 dice pool (Degenesis rules for botches and triggers). Find centralized, trusted content and collaborate around the technologies you use most. How to follow the signal when reading the schematic? How Intuit democratizes AI development across teams through reusability. Find centralized, trusted content and collaborate around the technologies you use most. FROM MILITARY_ASSOC JOIN STPR_STATUSES While using W3Schools, you agree to have read and accepted our. ELSE Fixed_Others END) Yes, you can use a CASE within CASE in SQL. What video game is Charlie playing in Poker Face S01E07? Below Diagram illustrate the execution flow of the Searched Case. A subquery is a SQL query nested inside a larger query. This process of comparing Case_Expression with Value will continue until Case_Expression finds matching equivalent value from the set of Value_1, Value_2,. Employees that have the SalariedFlag set to 1 are returned in order by the BusinessEntityID in descending order. To learn more, see our tips on writing great answers. Although, here is your script, written corectly: although you could just use coalesce as Joe suggested. We will show you how to do it. more expressions may be combined together using the logical 103, 3. Below is the example MS-SQL code. This means that each expression in the WHEN section is evaluated individually. The SQL CASE statement allows you to perform IF-THEN-ELSE functionality within an SQL statement. AND ic.product_theme IN (US Topo, Hist) CASE clause uses a rule to return a specific result based on the specified condition, similar to if/else statements in other programming languages. Does it work for you? Connect and share knowledge within a single location that is structured and easy to search. Asking for help, clarification, or responding to other answers. This statement evaluates the series of conditional expressions provided in WHEN and returns the result set. A subquery can be nested inside other subqueries. Do I need a thermal expansion tank if I already have a pressure tank? CASE statement in SQL procedures CASE statements can be used to conditionally enter into some logic based on the status of a condition being satisfied. ( A girl said this after she killed a demon and saved MC). Examples might be simplified to improve reading and learning. Notice how I didnt give a name to the inner case statement. Thanks for the comment. when ued.user_type in (85,73,74) then t2.amt_type in (TXN_AMT,COMM) else t2.amt_type =TXN_AMT end case, Write a query to display EMPLOYEES having ID 101,102,103 as per the CASE keyword is immediately followed by CASE_Expression and before WHEN statement. and Case Below is the execution approach: If Boolean_expression_1 is TRUE, then further WHENTHEN statements are skipped, and CASE execution will END immediately. The Boolean expression evaluated when using the searched CASE format. Thank you very much, ORDER BY first_name, last_name; then the so called the column alias Continent is truncated to Con. If flight tickets are less than $100, then I will visit Los Angeles. Depending upon Flight ticket value, one amongst the following result will be displayed: We can use CASE inside CASE in SQL. We can nest CASE statements similar to nested ifs that we find in most programming languages. Thanks for contributing an answer to Stack Overflow! WHEN THEN Statement_2, E.g. END AS TELEFONO, SELECT columms, This example shows how the CASE statement is used in a WHERE clause. In ApexSQL Refactor in the Lists tab under the Columns sub-tab, formatting options can be combined for data statements formatting such as Select, Insert etc. Mostly used when we use CASE in the select clause. AND g.itcl_id != 163 Result: Below diagram explains the execution flow of a SIMPLE CASE with ELSE. : NULL N/A g.cell_id, Multiple queries in mysql to the information schema. In MS SQL, there are two types of CASE: Simple CASE and Searched CASE. Optimize SQL Queries with CASE Expressions in Unexpected Ways | by Boris J | Towards Data Science Write Sign up Sign In 500 Apologies, but something went wrong on our end. You can probably write two CASE statements to display it: By accepting all cookies, you agree to our use of cookies to deliver and maintain our services and site, improve the quality of Reddit, personalize Reddit content and advertising, and measure the effectiveness of advertising. Then Tutorial_name value is compared with each WHEN values, i.e. How do I UPDATE from a SELECT in SQL Server? It doesnt make several steps on different variables to get the result you want. Your select's are also exactly the same, so there isn't really a need for a case unless of course you intend for them to be different. ic.product_type = Graphics So, how can you have an SQL IF statement? I want to redo the following using CASE. Query 2: SIMPLE CASE with the ELSE option. wo , last_chg, case. Hopefully my SQL query will clear up what I'm trying to do: SELECT dateOfBooking, amORpm, conferenceRoomID, noDelegates, cateringInfo, allergyInfo, specialAccessInfo, bottledWaterNeeded, projectorNeeded, lecternNeeded FROM ( SELECT * FROM dbo.tableBookingSlots WHERE bookingID . I will explain this statement in detail. We will also then understand the concept of having a SELECT statement acting as a filter to other SELECT statement which is also called . WHERE ( whether CASE_Expression = VALUE_1, VALUE_2. INNER JOIN A001470.INDIVIDUOCUENTAFACTURACION ICF GROUP BY prod; The GROUP BY is outside the subquery so it should work. Hi Sue, SELECT = In SQL Server, the purpose of the CASE expression is to always return an expression. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. SELECT NUMEROLINEA, hi Ben FROM ( Your email address will not be published. This example shows all customerswho live inNorth America, using the CASE statement to restrict the records. Syntax for SQL Server, Azure SQL Database and Azure Synapse Analytics. The statement returns the hourly rate for each job title in the HumanResources.Employee table. Why are physically impossible and logically impossible concepts considered separate in terms of probability? Ben, I think I am having the same issue This means the WHEN expressions are all compared to that field. The function returns the first and last name of a given BusinessEntityID and the contact type for that person. Returns result_expression of the first Boolean_expression that evaluates to TRUE. The. Hopefully my SQL query will clear up what I'm trying to do: OR just do it in that way without subquery. I don t understand one thing: sometimes (and which are the conditions to be so? Making statements based on opinion; back them up with references or personal experience. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. About an argument in Famine, Affluence and Morality. ( CASE WHEN MOD(yourcolumn, 2)=1 THEN yourcolumn ELSE null END AS oddvalue Case expressions may only be nested to level 10. This Boolean_Expressions: Boolean_Expression_1, Boolean_Expression_2, evaluates the TRUE/FALSE condition for each WHEN Statement. WHEN MILITARY_STATUSES = DODAF, DODAG,DODAR,DODCG,DODMA,DODNA,DODNG If you want to use the alias (the AS prod part) in the GROUP BY, you cant do this in the same query. Programmatic interfaces for the case when in select statement in sql select, then oracle is sql join and analysis. CASE Statement in SQL Server is the extension of IFELSE statement. ELSE NUMEROTELEFONO Making statements based on opinion; back them up with references or personal experience. Time Surat Memu; Trade Of Agreements; Colleges Offer; I havent used UNPIVOT much before so it was a good example of using it. See those and add your comments. Result: Below diagram explains the execution flow of the SEARCHED CASE with NO ELSE. NUMERODOCUMENTO AS DNI, Margaret, select d.seq, Topo Layer Type, Avg from The following example uses the CASE expression in an UPDATE statement to determine the value that is set for the column VacationHours for employees with SalariedFlag set to 0. More examples of Nested Subqueries. Jordan's line about intimate parties in The Great Gatsby? ELSE NUMEROMOVIL END In the order specified, evaluates input_expression = when_expression for each WHEN clause. Acidity of alcohols and basicity of amines. Only one condition can be true. WHEN MILITARY_STATUSES (AAIR,DODAF,FAMAF,RAIR,VAIR) The only time I can think of where the CASE statement runs through each condition is if the first condition is false. Conceptually, the subquery results are substituted into the outer query. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. select d.seq, Historical Layer Type, Avg from group by prod,purchase_flag CASE NUMEROMOVIL In the future someone may add another name to the table so I can't use a Case statement with static names. Case Statement Example 3. If you want to use IF logic, then use the CASE statement. There are two types of CASE expressions: simple and searched. Within a SELECT statement, the searched CASE expression allows for values to be replaced in the result set based on comparison values. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. I need to use case statement like below written ,Can someone help me in this ? To learn more, see our tips on writing great answers. What is a word for the arcane equivalent of a monastery? order by prod, Hi Abhi, You did it all without any UNIONs. WHEN USA THEN North America SELECT SQL> select emp_name , case when Salary < 10000 then 'Junior Level' when (Salary >=10000 and Salary < 50000) then 'Middle Level' when (Salary >= 50000 and Salary < 100000) then 'Senior Level' else (Case when grade ='20' then 'Vice President' when grade='21' then . reading and return the result. In simple CASE expressions, an expression is compared with a value. Add a column with a default value to an existing table in SQL Server, How to concatenate text from multiple rows into a single text string in SQL Server. How do I perform an IFTHEN in an SQL SELECT? It first checks the country and then checks for a particular customer name to see if it is male or female (given that Sally is the only female here). Boolean_expression is any valid Boolean expression. To learn more, see our tips on writing great answers. Not the answer you're looking for? WHEN current_page_url %optus.com.au/shop/broadband/mobile-broadband% THEN Fixed_MBB I love when I get to work on a wuery with t1,t2,t3,t4,t5,t6. Below is the execution approach: If Case_Expression is equivalent to Value_1, then further WHENTHEN statements are skipped, and CASE execution will END immediately. There is a way to do this though. dl_month, To do this, you can replace your CASE statement with: CASE NUMEROTELEFONO INNER JOIN A001470.CUENTAFACTURACION CF ELSE NULL The CASE statement goes through conditions and return a value when the first condition is met (like an IF-THEN-ELSE statement). Unlike IFELSE, where only the maximum of one condition is allowed, CASE allows the user to apply multiple conditions to perform different sets of actions in MS SQL. WHERE PER_MILITARY_ID=MILITARY_ASSOC.ID Your explanations are really helpfull but i still cant make work this query. I didnt need to this is not displayed and the name is already specified for the Continent column. (AVG(NULLIF(count_scan_map, 0))) AS avg_scanmap, Calculating probabilities from d6 dice pool (Degenesis rules for botches and triggers), Styling contours by colour and by line thickness in QGIS, Partner is not responding when their writing is needed in European project application, Redoing the align environment with a specific formatting. We can use GROUP BY and COUNT and a different case statement to count how many students passed the exam. CASE NUMEROTELEFONO group by to_char(dldate,YYYY-MM))) d select ename, job, sal, case -- Outer Case when ename like 'A%' then case when sal >= 1500 then 'A' -- Nested Case end when ename like 'J%' then case when sal >= 2900 then 'J' -- Nested Case end end as "Name-Grade" From Emp else_result_expression is any valid expression. WHEN Value_1 THEN Statement_1 The following SQL statement will return "Monday" if today is a Monday, otherwise it returns "Not a Monday". Syntax. How can I explain to my manager that a project he wishes to undertake cannot be performed by the team? Azure Synapse Analytics A simple expression to which input_expression is compared when the simple CASE format is used. Specifies the then expression based on the boolean_expression condition; then_expression and else_expression should all be same type or coercible to a common type. )CASE exits when first value/expresion is TRUE, and sometimes it goes through all values/expresions?! We can see that the results show different values based on the nested CASE statement. THEN ESTADOPROVISIONAMIENTO AS ESTADO, The CASE expression evaluates its conditions sequentially and stops with the first condition whose condition is satisfied. How to show that an expression of a finite type must be one of the finitely many possible values? Is it possible to create a concave light? Specifies any expression that evaluates to a result type boolean. The data types of input_expression and each when_expression must be the same or must be an implicit conversion. (AVG(NULLIF(count_topo, 0))) AS avg_topo, It doesnt evaluate all conditions before comparing the first one to the expression. Using Kolmogorov complexity to measure difficulty of problems? If there is no ELSE part and no conditions are true, it returns NULL. This is a nonsensical example, but could you do something like this:? It checks the number of employees and determines if they have an odd or even number of employees. Why are non-Western countries siding with China in the UN? In the AdventureWorks2019 database, all data related to people is stored in the Person.Person table. However, if youre reaching the limit of 255 expressions, I would be looking at the efficiency of the query itself, as most queries should not need 255 expressions. AND ( (AVG(NULLIF(count_hist, 0))) AS avg_hist WHEN THEN Statement_1 When expression2 Then Result2. 101, 2. case-operand. For example, the following query produces a divide by zero error when producing the value of the MAX aggregate. t_wm_wallet_info wi, t_um_entity_detail ued WHEN MILITARY_STATUSES = FAMAF,FAMAG,FAMAR,FAMCG,FAMMA,FAMNA,FAMNG : Ben. ) ) or (g.cell_id is null and :P835_STATE in (%,MP))) Structured Query Language (SQL) is used to manage data in a relational database management system (RDBMS). SELECT CASE WHEN score >= 60 THEN "passed" ELSE "failed" END AS result, COUNT(*) AS number_of . THEN HON On Contrary, SEARCH CASE example has no CASE Expression: Here, each WHEN statement has its Conditional Boolean expression. In Searched Case, Boolean_Expression exists for each WHEN statement. Not the answer you're looking for? SELECT ITEM ,DETAIL_LEVEL_DESC AS DESCRIPTION ,COMP_DETAIL_ID AS PROMO_ID ,CASE WHEN CHANGE_TYPE = 'N' THEN CASE WHEN INSTR (UPPER (DETAIL_LEVEL_DESC), 'S/P')!=0 THEN 'SPP' When subtracting 10 hours from VacationHours results in a negative value, VacationHours is increased by 40 hours; otherwise, VacationHours is increased by 20 hours. Is it plausible for constructed languages to be used to affect thought and control or mold people towards desired outcomes? Ob Long; Position; Hacker Database. ) Yes, you can use an SQL CASE in a WHERE clause. and t1.entity_id = ued.entity_id The parameters Statement_1, Statement_2 denote the Statements which will execute if its corresponding Boolean_Expression_1, Boolean_Expression_2 result is TRUE. ON I.IDINDIVIDUO = ICC.IDINDIVIDUO So far I've tried: Which seems to match the MSDN examples at http://msdn.microsoft.com/en-us/library/ms181765.aspx . In MS SQL, there are two types of CASE. Does a summoned creature play immediately after being summoned by a ready action? For example, you can use CASE in statements such as SELECT, UPDATE, DELETE and SET, and in clauses such as , IN, WHERE, ORDER BY, and HAVING. The CASE expression goes through conditions and returns a value when the first condition is (in the example above, the case results are captured as prod ). Below Diagram illustrate the execution flow of Simple Case. E.g. Exclude a column using SELECT * [except columnA] FROM tableA? The difference between the phonemes /p/ and /b/ in Japanese. SQL HOME SQL Intro SQL Syntax SQL Select SQL Select Distinct SQL Where SQL And, Or, Not SQL Order By SQL Insert Into SQL Null Values SQL Update SQL Delete SQL Select Top SQL Min and Max SQL Count, Avg, Sum SQL Like SQL Wildcards SQL In SQL Between SQL Aliases SQL Joins SQL Inner Join SQL Left Join SQL Right Join SQL Full Join SQL Self Join SQL . in It returns a corresponding value associated with the condition defined by the user. SUM(count_scan_map) AS count_scan_map, How do I perform an IFTHEN in an SQL SELECT? g.itcl_id, Tuesday, May 12, 2015 2:34 PM. There are two types of CASE statements: Simple case statement: used to enter into some logic based on a literal value Searched case statement: used to enter into some logic based on E.g. In Simple Case, VALUE exists for each WHEN statement. Syntax: There can be two valid ways of going about the case-switch statements. rev2023.3.3.43278. The following example uses the CASE expression in a HAVING clause to restrict the rows returned by the SELECT statement. expr: Any expression for which comparison is defined. met (like an if-then-else statement). Due to its name, this expression is regularly mistaken for the CASE statement available in some other languages. Learn more about this powerful statement in this article. In the above example CASE is NESTED inside another CASE statement: The system starts with executing the outer CASE. In case youre not sure, an IF statement allows you to do something if a condition is true, and something else if the condition is false. I think I'm close but I can't quite get the syntax right. HOW TO: Select MAX(T2.Id) of T2 for a given value T2.Value? Welcome to the eighth installment of this SAP HANA SQL Scripts core concepts section where we learn how to pick up different data for the same field when provided with unique conditions with SQL CASE statement. Most of the entries in the NAME column of the output from lsof +D /tmp do not begin with /tmp. The CASE statement goes through conditions and return a value when the first condition is met (like an IF-THEN-ELSE statement). Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Since your THEN and your ELSE branch are equal, you can just get rid of the CASE. The procedural languages for each database do have an IF statement: This statement works just like other languages. SQL Server Case Statement. WHEN Canada THEN North America Required fields are marked *. ELSE 0 END as Qty. Where does this (supposedly) Gibson quote come from? Is there a proper earth ground point in this switch box? This is case statement within the case statement. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Let us see an example. Hi Claudia, are you running this on SQL*Plus? I moved a copy of the database from production DB (SQL 2005) to my local machine running SQL 2008, and then indexed the copy of the database. SQL has an ability to nest queries within one another. I'm sure it's probably pretty simple but can't see what's wrong. It is also possible to use it with SET, IN, HAVING, ORDER BY and WHERE. ELSE Result. And I had never used UNPIVOT. ) sub The examples below will show how this is done. The following examples use the CASE expression in an ORDER BY clause to determine the sort order of the rows based on a given column value. Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2. how to get the distinct records based on maximum date? SELECT (CASE WHEN when last_chg='2009001' then . Arguments. CASE Col1 WHEN 1 THEN 11 WHEN 2 THEN 21 ELSE 13 END. Change Linked; Affidavit Tcs. Connect and share knowledge within a single location that is structured and easy to search. A case expression allows the user to use IF - THEN - ELSE logic without using procedures in SQL statements. Well, you opened a way out. Calculating probabilities from d6 dice pool (Degenesis rules for botches and triggers). SUM(count_hist) AS count_hist This example shows what happens if there are records that match with multiple WHEN expressions. The simple CASE expression compares an expression to a set of simple expressions to determine the result. However, it uses an IN clause, which means the value is checked to see if it is in the IN parameter. I'm having trouble getting a CASE statement to work in a nested select. This process of assessing Boolean_expression will continue until one of the Boolean_expression returns TRUE. A common question on SQL CASE statements is if the database evaluates all of the conditions in the CASE statement, or does it stop after finding the first match? Lets Query Guru99 table to check the updated value: We can use CASE with Order By. You know how sometimes when you think about something your brain starts to go in circles? IF() and SWITCH() are two recommended functions for getting the same results as a CASE expression. If Flight_Ticket < $400 then inner CASE will execute. The CASE statement should let you do whatever you need with your conditions. expr A general expression. Hope that helps! How do I perform an IFTHEN in an SQL SELECT? from GRAPHICS_DOWNLOAD g where itcl_id select d.seq, Scan Map Layer Type, Avg from In addition to SELECT, CASE can be used with another SQL clause like UPDATE, ORDER BY. Nested statements are usually Select statements. The CASE statement should exit when it reaches the first TRUE condition. CASE WHEN Value_1 THEN Statement_1In the above example, the only operation performed by the system is checking if Case_Expression = Value_1. A perfect replacement doesn't exist for the SQL expression CASE in DAX. Ive updated it here. CASE WHEN THEN Statement_1, E.g. The Goal: To compare my "Status_W1" column with my "Status_Now" column to see if there was a shift in pipeline to higher stages in the sales funnel. This example performs a searched CASE using a number field, which is the number of employees. Cookie Notice What is the purpose of this D-shaped ring at the base of the tongue on my hiking boots? How do I UPDATE from a SELECT in SQL Server? purchase_flag vegan) just to try it, does this inconvenience the caterers and staff? value In the second form of CASE, each value is a potential match for expr. DECODE is older, and CASE was made as a replacement for DECODE. Its a common feature of many programming languages. The simple CASE expression operates by comparing the first expression to the expression in each WHEN clause for equivalency. STEP 2: Using C_ID of step 1 for finding S_ID. Is it possible to create a concave light? The parameters or components of the CASE SQL statement are: There are actually two ways to use an SQL CASE statement, which are referred to as a simple case expression or a searched case expression. but an approach that may work is selecting only the simple-name records and then a nested SELECT expression that will count all records with that name. It comes in two formats: simple case search case Simple SQL CASE The CASE statement allows you to perform an IF-THEN-ELSE check within an SQL statement. Its SQL Server only. However, as I said, it is difficult. As the data for columns can vary from row to row, using a CASE SQL expression can help make your data more readable and useful to the user or to the application. WHEN NULL THEN CASE case_value WHEN when_value THEN statement_list [WHEN when_value THEN statement_list] . THEN NG In the first example, the value in the SalariedFlag column of the HumanResources.Employee table is evaluated. Statements that include a subquery usually take one of these forms: WHERE expression [NOT] IN (subquery) WHERE expression comparison_operator [ANY | ALL] (subquery) WHERE [NOT] EXISTS (subquery) Check for more subquery rules and subquery types. My question is if you can use the SAME CASE statement in both places in the SAME query, with one referencing the other. CASE http://msdn.microsoft.com/en-us/library/ms181765.aspx, How Intuit democratizes AI development across teams through reusability. Check out this page here that lists all SQL functions along with links to their guides. WHEN NULL THEN value is null Glad it helps! If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail: W3Schools is optimized for learning and training. The expression returned if no comparison operation evaluates to TRUE. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. WHEN MILITARY_STATUSES (AARMY,DODAR,FAMAR,RARMY,VARM) What does this means in this context? Is it suspicious or odd to stand by the gate of a GA airport watching the planes? The nature of simulating nature: A Q&A with IBM Quantum researcher Dr. Jamie We've added a "Necessary cookies only" option to the cookie consent popup. This example performs the same check as the other examples but uses the searched case method. However, you can use a native SQL statement to achieve the same goal. It can be used in the Insert statement as well. When case-operand is specified, when-condition is a shortened sql-expression that assumes case-operand as one of its operands and that resolves to true or false.. and our I'm sure it's probably pretty simple but can't see what's wrong.