Sql case when multiple columns. item as item, itemsreq.

Sql case when multiple columns. My goal when I found this question was to select multiple columns conditionally. It is not used for control of flow like it is in some other languages. Additionally, someone might use the following logic to not repeat the CASE (if it suits you. insuredname else b. proposalno=a. proposalno where a. Nov 22, 2016 · Although, someone should note that repeating the CASE statements are not bad as it seems. NET - you cannot execute a block of code depending on a condition – marc_s Commented Dec 31, 2014 at 8:26 Feb 21, 2016 · Thanks! When I see a multi-column WHERE IN (SELECT) I only see case 2, since they would be returned as a list of N column tuples so the multiple IN solutions don't seem to match. itemaprobado = 1 then case when . I didn't necessarily need the case statement, so this is what I did. For example: SELECT a1, a2, a3, Jun 16, 2011 · Case does support multiple columns in the conditional check. itemaprobado=1 then 'aprobado' when itemsreq. SQL Server's query optimizer is smart enough to not execute the CASE twice so that you won't get any performance hit because of that. . Therefore, it can't be used to conditionally decide among multiple columns or other operations. The question's query looks like a case of matching on composite foreign keys to get all table1 records associated with :_Lead_Key and I would have gone to CTE/JOIN. itemaprobado=0 then 'no aprobado' end) as items, (case when itemsreq. ) Oct 9, 2016 · What is the correct syntax to return exactly two columns from such CASE statement? select case when a. itemaprobado = 0 then case when requisiciones. policyno[2] in ('E', 'W') then c. ORDER BY CASE @OrderByColumn WHEN 1 THEN Forename END DESC, CASE @OrderByColumn WHEN 1 THEN Date END, CASE @OrderByColumn WHEN 1 THEN Location END, CASE @OrderByColumn WHEN 2 THEN Surname END ASC Dec 31, 2014 · CASE in T-SQL is an expression to return one of several values - it is NOT a program-flow control like in C# or VB. itemaprobado = 1 then case when Nov 22, 2016 · Although, someone should note that repeating the CASE statements are not bad as it seems. Dec 2, 2011 · Depending on your use case, instead of using a case statement, you can use the union of multiple select statements, one for each condition. cantidad as cantidad, (case when itemsreq. CASE WHEN A=X AND B=Y THEN END What you are trying to do in your example is return a table (2 columns) into a resultset that expects one column: col1, col2, (col3,col4). If you want to understand VALUE try this query which creates a virtual 1 column table: SELECT * FROM (VALUES (1), (5), (1)) as listOfValues(columnName) And this query which creates a virtual 2 column table: SELECT * FROM (VALUES (1,2), (5,3), (1,4)) as tableOfValues(columnName1, ColumnName2) Now you can understand why that sample query has AS You can write multiple cases, even if they all have the same condition. item as item, itemsreq. select itemsreq. insuredname end from prpcmain a left join prpcinsured_1 b on b. insuredcode || b. something like this, two conditions two columns. You need to return them separately: col1, col2, col3, col4 I initially didn't understand VALUE(v) either. insuredcode || c. proposalno left join prpcinsured_2 c on c. recibida is null then 'item no aprobado para entrega' end when itemsreq. policyno Even in Oracle (and in fact in the SQL standard), CASE is an expression that returns a single value.

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