This is a simple question, I’ve read some details about using CASE in WHERE clause, but couldn’t able to make a clear idea how to use it. The below is my sample query: 1 SELECT * FROM dual 2 …
Tag: case
SQL SERVER: Check if variable is null and then assign statement for Where Clause
I am trying to achieve something like the below in WHERE clause in sql. I tried the following: which is wrong. Can anyone help in framing the exact statement. Thanks! Answer Isnull() syntax is built in for this kind of thing. For your example keep in mind you can change scope to be yet another where predicate off of a
Problems with Postgresql CASE syntax
Here is my SQL query: When I execute the above query, I get this error: ERROR: CASE types record and integer cannot be matched From the error message I understand that PostgreSQL take the second select, respectively elapsed_time_from_first_login as a row, even if it will always be a single value (because of the min() function). Question: do you have some
T-SQL: Using a CASE in an UPDATE statement to update certain columns depending on a condition
I am wondering if this is possible at all. I want to update column x if a condition is true, otherwise column y would be updated I have searched all over, tried out some things and am unable to find a solution. I think it’s not possible, but I thought I would ask here and see if anyone has done
Mysql SELECT CASE WHEN something then return field
I have two field nnmu and nnmi , and reverse, At first everything looks good, but somehow it mix up values, it work when nnmi and nnmu both are equal to 0, but when either value is 1 it returns nonsense. Any help? Answer You are mixing the 2 different CASE syntaxes inappropriately. Use this style (Searched) Or this style
Dynamic order direction
I writing a SP that accepts as parameters column to sort and direction. I don’t want to use dynamic SQL. The problem is with setting the direction parameter. This is the partial code: Answer You could have two near-identical ORDER BY items, one ASC and one DESC, and extend your CASE statement to make one or other of them always
How do I perform an IF…THEN in an SQL SELECT?
How do I perform an IF…THEN in an SQL SELECT statement? For example: Answer The CASE statement is the closest to IF in SQL and is supported on all versions of SQL Server. You only need to use the CAST operator if you want the result as a Boolean value. If you are happy with an int, this works: CASE