I am trying to use a CASE statement in the WHERE clause, but I am receiving syntax errors and am not sure what I am doing wrong or if there is a better way to approach it. SELECT lr.* FROM lab_results lr ,patient pat WHERE lr.patient_id = pat.patient_id and CASE WHEN datepart(...
Linux C C++ Python Vue.js Nginx SQL NoSQL kubernetes 标签: case-statement 如何在CASE语句中分配多个值?我需要根据 CASE 语句为我的选择分配两个值。伪: select userid , case when name in ('A', 'B') then 'Apple' when name in ('C', 'D') then 'Pear' end as snack from table ; Run...
'VARCHAR' is not a recognized built-in function name. 'WHEN MATCHED' cannot appear more than once in a 'UPDATE' clause of a MERGE statement. "EXECUTE AT" with Dynamic Linked Server Name "explicit value must be specified for identity column in table" error in SQL 2000 "FROM clause have ...
SQL CASE Statement - Learn how to use the SQL CASE statement to perform conditional logic in your SQL queries effectively.
The case statement in SQL returns a value on a specified condition. We can use a Case statement in select queries along with Where, Order By, and Group By clause. It can be used in the Insert statement as well. In this article, we would explore the CASE statement and its various use...
Let’s illustrate with an example. The following SQL statement will return “Monday” if today is a Monday, otherwise it returns “Not a Monday”. SETDATEFIRST1-- first day of the week is a MondaySELECTCASEWHENDATEPART(WEEKDAY,GETDATE())=1THEN'Monday'ELSE'Not a Monday'END ...
If none of these conditions in the WHEN clauses are met, the ELSE clause provides a default result. Why is the CASE Statement Important? The CASE WHEN statement is a valuable tool in SQL queries, offering several key benefits: Data transformation: enables you to create new columns based on...
–简单Case函数 CASE sex WHEN ‘1’ THEN ‘男’ WHEN ‘2’ THEN ‘女’ ELSE ‘其他’ END ...
from student); [Err] 1093 - You can't specify target table 'student' for update in FROM clause 描述: 如果子查询的...解决方法: 通过给 from 子句中的结果集起别名。...student m where m.id = 1; [Err] 1064 - You have an error in your SQL syntax; 描述: delete from table 这样的句子...
Can you post the full execution plan? You might be hitting the scan because of other things within the query, such as performing functions on the columns then using them as part of the WHERE clause. "The credit belongs to the man who is actually in the arena, whose face is marred by ...