This SQL Server tutorial explains how to use the SQL Server (Transact-SQL) CASE statement with syntax and examples. In SQL Server (Transact-SQL), the CASE statement has the functionality of an IF-THEN-ELSE statement. You can use the CASE statement within
To finish up, let’s take a look at CASE functionality inside an UPDATE statement. The employees deserve a bonus in the form of extra vacation days. If you don’t have many left, you get 3 extra days. If you have between 10 and 20 hours left, you get 2 extra days, otherwise you ...
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...
Simple Case Statement CASE [input_expression] WHEN when_expression THEN when_true_result_expression [...n] [ELSE else_result_expression] END Search Case Statement CASE WHEN Boolean_expression THEN when_true_result_expression [...n] [ELSE else_result_expression] END ...
Automatically UpperCase ALL MS SQL Server Keywords AutoNumber in T-SQL Select Statement AVG ->Operand data type varchar is invalid for avg operator avoid insertion of duplicate entries in a BULK INSERT statement Bad performance of EXCEPT operator Basic - select with fixed values - invert columns ...
...= "" IF ELSE 流程控制语句 在mysql存储过程中的用法: IF search_condition THEN statement_list [ELSEIF search_condition...[ELSE statement_list] END IF IF作为一条语句,在END IF后需要加上分号“;”以表示语句结束,其他语句如CASE、LOOP等也是相同的。...UPDATE salary SET sex = IF(sex = 'm'...
SQL USEAdventureWorks2022; GOSELECTProductNumber,Category=CASEProductLineWHEN'R'THEN'Road'WHEN'M'THEN'Mountain'WHEN'T'THEN'Touring'WHEN'S'THEN'Other sale items'ELSE'Not for sale'END,NameFROMProduction.ProductORDERBYProductNumber; GO B. Use a SELECT statement with a searched CASE expression ...
if/then else case statement query in SQL ServerThis creates start and end columns by doing a ...
case语句与case表达式是plsql流程控制的重要组成部分,尽管其使用方法较为简单,但容易混淆。...本文将描述case语句与case表达式并给出演示以便于更好理解两者的异同及使用时的注意事项。...WHEN EXPRESSION N THEN STATEMENT N; ELSE STATEMENT N+1; END CASE; --简单的case语句是指SELECTOR中得到的值或结果与EXPR...
The case expression is a flexible and effective way of adding conditional logic into a SQL statement. It can often server a function similar to an If/Else construct in other languages. In many cases, if the same simple case expression will be used repeatedly or with a large number of possi...