sql case statement
Simple PL/SQL CASE statement A simple CASE statement evaluates a single expression and compares the result with some values. The simple CASE statement has the following structure: CASE selector WHEN selector_value_1 THEN statements_1 WHEN selector_value_1 THEN statement_2 ... ELSE else_state...
1.CASE 写法如下: CASE WHEN condition1 THEN result1 WHEN condition2 THEN result2 WHEN conditionN THEN resultN ELSE result END; 解释:1)先匹配第一条,不匹配的话继续第二条,如此循环,
CASE With ELSE ACASEstatement can have an optionalELSEclause. TheELSEclause is executed if none of the conditions in theCASEstatement is matched. Syntax SELECTcustomer_id, first_name,CASEWHENcondition1THENresult1WHENcondition2THENresult2-- Add more WHEN conditions and results as neededELSEelse_resu...
CASE 语句在指定的搜索条件为 true 时执行一条或多条语句。 CASE 是独立的语句,它与必须作为表达式组成部分出现的 CASE 表达式不同。 CASE 语句有两种形式:简单 CASE 语句和搜索型 CASE 语句。 简单CASE 语句 (PL/SQL) 简单CASE 语句尝试将表达式 (称为选择器) 与一个或多个 WHEN 子句中指定的另一个表达式...
case when OTPTradeId is NULL Then 'No' Else 'Yes' End as 'TCM' from Trade left join TCM on TradeID = OTPTradeId where tradedate = '17 Jun 2013' Viewing 5 posts - 1 through 4 (of 4 total) You must be logged in to reply to this topic.Login to reply...
This Oracle tutorial explains how to use the Oracle / PLSQL CASE statement with syntax and examples. The Oracle / PLSQL CASE statement has the functionality of an IF-THEN-ELSE statement. Starting in Oracle 9i, you can use the CASE statement within a SQL
set statement_force_abort_timeout=0; -- 清理表分区数据 truncate table DMS_TBL_CFG_AUTO_INCREASE_PART; CREATE TABLE IF NOT EXISTS DMS_TS_HARDWARE_CPU_OLD ( CTIME BIGINT NOT NULL, VIRTUAL_CLUSTER_ID INT NOT NULL, HOST_ID INT NOT NULL, USAGE NUMERIC(16, 2), PRIMARY KEY (CTIME, VIRTUA...
Github的这个Flink sql Gateway貌似很久没有更新了。但是它毕竟只是与BE交互的FE,还是可以参考。 启动Gateway 代码语言:javascript 代码运行次数:0 运行 AI代码解释 ./bin/sql-gateway.sh-h The following options are available:-d,--defaults<defaultconfiguration file>The propertieswithwhich everynewsessionis initi...
WHEN 1 THEN'Salaried Employee'WHEN 0 THEN'Contractor'ELSE'N/A'END FROM [HumanResources].[Employee] The downside of the simple CASE statement is that you can only check for equality. The IIF function With SQL Server 2012, theIIF functionwas introduced into the T-SQL language. The syntax is...