This Oracle tutorial explains how to use the Oracle/PLSQLCASE statementwith syntax and examples. Description The Oracle/PLSQL CASE statement has the functionality of an IF-THEN-ELSE statement. Starting in Oracle
The case statement will compare each owner value, one by one. 译:case条件将一个一个的比较每个所有者的值: One thing to note is that the ELSE clause within thecasestatement is optional. You could have omitted it. Let's take a look at the SQL statement above with the ELSE clause omitted...
如何使用 Oracle Case Statement 测试不等式问题描述 投票:0回答:3这很好用: select case (1+2) -- (or_some_more_complicated_formula_yielding_a_numeric_result) when 200 then '200' when 100 then '100' else 'other' end hi_med_low from dual ; 但我需要做更多这样的事情: select case (1+...
Fields inherited from interface oracle.javatools.db.sql.SQLFragment CONNECTBY, FROM, GROUPBY, HAVING, MODEL, NOCYCLE, ORDERBY, ORDERSIBLINGSBY, PRIOR, SELECT, STARTWITH, TYPE, WHEREFields inherited from interface oracle.javatools.db.DBObject COMMENTConstructor Summary CaseStatement.WhenThen() Case...
decode函数在Oracle SQL查询语句中的使用非常广泛,也经常应用到PL/SQL语句块中。...可以作如下理解该表达式: 1,如果expr1 = expr2,decode函数返回expr3表达式的值; 2,如果expr1 !...= expr2,decode函数返回expr4表达式的值,如果expr4未指定,则返回null; 使用示例1: select decode(1,-1,100,90),decode(-...
5.1 CASE语句 1. CASE语句具有如下结构 CASE SELECTOR WHEN EXPRESSION 1 THEN STATEMENT 1; WHEN EXPRESSSION 2 THEN STATEMENT 2; ... WHEN EXPRESSION N THEN STAT
CASE expression syntax is similar to an IF-THEN-ELSE statement. Oracle checks each condition starting from the first condition (left to right). When a particular condition is satisfied (WHEN part) the expression returns the tagged value (THEN part). If none of the conditions are matched, the...
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_statements END CASE;Code language: PostgreSQL SQL dialect and PL/pgSQL (pgsql) Let’s examine the syntax of the simple CASE st...
The coalesce statement is a bit like the Oracle NVL function. Given an unlimited number of arguments, it will return the first non-null value in those arguments. Here is an example: SELECT ename, COALESCE(comm, 0) COMM FROM emp;
ORACLE PLSQL 简单case语句 1 简单的case语句会给出一个表达式，并将可能发生的结果与其做比较，如果匹配成功则执行对应的语句 2 语法：[ <<lable_name>> ]CASE case_operandWHEN when_operand1 THEN statement1;[WHEN when_operand2 THENstatement1;] ...[ELSEstatementN]END CASE [ lable_name ];3 说明...