In this example, if the deptno column has a 10 in it, the SQL query will return the value accounting rather than the number 10. If the deptno is not 10, 20, 30, or 40, then the CASE statement will fall through to the ELSE clause, which will return unassigned. Note that with a s...
14 rows selected. 2. Case Statement 只可以用在pl/sql中,不能用在SQL中,结束标志是END CASE!Case Statement 相当于一组IF…THEN…ELSE…END IF语句,不需要返回值,只是在条件匹配的时候执行某种操作而已,所以在每个WHEN…THEN之后需要有一个分号,表示一条执行语句! CASE {variable or expression} WHEN {value}...
n_commission := 0.15; Code language: PostgreSQL SQL dialect and PL/pgSQL (pgsql) PL/SQL stops evaluating the subsequent condition once it finds the first condition that evaluates to TRUE. Therefore, in this example, PL/SQL will never evaluate the last two conditions in the CASE statement. ...
and checking multiple conditions, all in a SQL query itself. Moreover, using the CASE function, multiple conditions provided in separate SQL queries can be combined into one, thus avoiding multiple statements on the same table (example given below). The function is available from Oracle 8i ...
The Oracle searchedCASEexpression evaluates a list of Boolean expressions to determine the result. The searchedCASEstatement has the following syntax: CASE WHEN e1 THEN r1 [ WHEN e2 THEN r2] ... [ELSE r_else]ENDCode language:SQL (Structured Query Language)(sql) ...
FromOracle Database 23ai, theautomatic SQL transpilercan extract SQL expressions in PL/SQL. These are then part of the SQL statement, so at runtime it's as-if the function doesn't exist! To do this, ensure thesql_transpilerparameter ison(it'soffby default). When a function in thewhere...
Oracle CASE在Else子句中出现多列失败 、 在Oracle下面的查询中,单列运行良好,但当我尝试放置多列时,如果没有特定表中的记录,并且其复杂的内部查询(下面是简化的问题描述),并且不能使用PL/SQL块,则实际上我的要求是退出SQL查询。SQL> select 浏览4提问于2017-01-03得票数 0 ...
oracle.javatools.db.sql Contains an API for declaratively parsing SQL queries (SELECT statements). Uses ofCaseStatement.WhenTheninoracle.javatools.db.sql Methods inoracle.javatools.db.sqlthat returnCaseStatement.WhenThen Modifier and TypeMethod and Description ...
CASEexpressions must include at least oneWHENexpression. The firstWHENexpression with aTRUEcondition is the one selected.NULLis notTRUE. The optionalELSEclause must always come at the end of theCASEstatement and is equivalent toWHEN TRUE THEN. If no condition matches, the result isNULLor the em...
CASEステートメントは、指定された検索条件がTRUEの場合、1つ以上のステートメントのセットを実行します。 CASEステートメントはスタンドアロンステートメントですが、前述のCASE式は式の一部として表示する必要があります。 CASEステートメントには2つの形式があります。 1つは検索CASEと呼...