The SQL CASE statement is a control flow tool that allows you to add if-else logic to a query. Generally speaking, you can use the CASE statement anywhere that allows a valid expression – e.g. with the SELECT, WHERE, and GROUP BY clauses. Question: What is an SQL Case? In SQL, ...
Alternative for OR in WHERE clause Alternative for PIVOT Alternative of CURSOR in SQL to improve performance ? alternative query for in clause Alternative to Full Outer Join Alternative to Row_Number Query Alternative way STUFF for XML PATH ('') ? Am getting an error when i run this c...
CASE doesn't work that way in SQL. CASE in SQL returns a value based on conditions. You're using it more like a VB version of CASE, where it executes code. Convert to a format like this: WHERE lr.sample_date >= CASE WHEN datepart(month,pat.start) = datepart(month, getdate()) -...
Based on the positioning of yourCASE ... WHEN, it appears you are trying to do the following:...
It is a rare thing to see boolean logic in SQL! Perhaps you should also post the truth tables for people who don't know what they are. Steve Kass 2003-11-17re: WHERE clause logic FYI, there is no guarantee that WHERE <filter 1> OR <filter 2> will be optimized so that the filter...
To do this, ensure thesql_transpilerparameter ison(it'soffby default). When a function in thewhereclause is transpiled, you can see the case expression instead of the function in the predicate section of the plan: There are a few differences betweencasein PL/SQL andOracle SQL. ...
Ignoring the case in awhereclause is very simple. You can, for example, convert both sides of the comparison to all caps notation: SELECT first_name, last_name, phone_number FROM employees WHEREUPPER(last_name) = UPPER('winand')
Side note:Be aware that the above approach may lead to performance issues. The SQL Server query ...
然后归属到不同的地区类别中，这样的代码会显得比较长，这里我们使用SQL中的in方法，这种方法比较灵活，...
In my case I decided to use dynamic sql - concatenating different where clauses onto a textual sql statement depending on which criteria were entered. This can still be fast, but you lose the syntax checking so coding it can be a bit of a pain if it's long. even so I'd use this ...