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Tag: case

SQL: use CASE with AS

I’m working on a long SQL request and I want to use CASE inside but I don’t know how to write it. My request looks like : I want to add something like : I tried to add this at the end but it didn’t work : My goal is to edit key along its value Answer You can do

SQL CASE WHEN won’t meet condition

This is a solution to one of the leetcode problem. It is asking me to output the second highest salary from the table and if there are no second highest salary then the output should be null. The above is my solution. I used case and when syntax but the problem is that even when the table only has 1

Using a subquery in a case statement in a where clause

I want to select different results (from a temp table) based on what a certain parameter is set to in the query. I want to exclude certain inventory SKUs if a particular warehouse is selected. I am getting this error, unfortunately. Msg 512, Level 16, State 1, Line 310 Subquery returned more than 1 value. This is not permitted when

Before/After Difference for a flexible Date (Case)

i have a little problem with a case. I output two date fields (yyyy-mm-dd). the date changes and is flexible. not every entry has the same date fields. I take one date field as an fixed point. If the Date is 4 months before the date, a ‘V’ should be the output. if it is behind it, an ‘N’ should

SQL CASE that matches value or uses LIKE ‘%’

I’m trying to do a wildcard retrieve if a defined variable is blank. But I can’t figure out the correct syntax. Answer It is as simple as this: The expression NULLIF(x, ”) will convert ” to null. Then we take advantage of how null comparison works: If @customerID is not null then first condition will be true only for exact

Access alias in CASE statement

I am trying to create a column called DateStartedStatus that utilizes a previously aliased column to compute its value. It should use CurrentStatus to output a value and an error is showing that says “Invalid column name ‘CurrentStatus'”. How can I access that alias in the below case statement? Answer Using subqueries like this Do not worry, subquery will not