搜索式CASE语句有个能够产生boolean(true,false,null)的搜索条件,当特定搜索条件计算结果为TRUE时,会执行与该条件相关的语句组合。搜索式CASE语句的语法如下所示: CASE WHEN SEARCH CONDIDTION 1 THEN STATEMENT 1; WHEN SEARCH CONDIDTION2 THEN STATEMENT 2; ... WHEN SEARCH CONDIDTIONN THEN STATEMENT N; EL...
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...
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：<<labl...
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 ...
SQL> insert into emp1 select * from emp; 传统方式数据 SQL> insert /*+ APPEND */ into emp1 select * from emp; 直接方式数据,必须commit后才能查看数据 【实验】直接路径插入数据 SQL>createtableemp1asselect*fromempwhere1=2; SQL>insertintoemp1select*from emp;conventional传统方式数据 ...
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) The searchedCASEexpression evaluates the Boolean expression (e1, e2, …) in eachWHENclause in the order that the Boolean expr...
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...
SQL在group by & select子句和CASE运算符中同时使用子查询EN冗长的标题和奇怪的问题:我想在oracle SQL...
PolledDataAvailableStatement指定适配器执行的 SQL 语句,以确定是否有任何数据可用于轮询。 仅当记录可用时,才会执行为PollingStatement绑定属性指定的 SELECT 语句。 默认值为SELECT 1 FROM DUAL,这意味着无论要轮询的表是否包含数据,适配器都必须继续轮询。
当出现"SQL statement ignored"错误时,通常是由于SQL语句中有语法错误或者逻辑错误导致Oracle无法正确解析SQL语句。要解决这个问题,需要检查SQL语句中的各个部分,确保语法正确,逻辑清晰,没有拼写错误或者其他错误。 以下是一些常见的导致"SQL statement ignored"错误的原因和解决方法: 检查SQL语句中的关键字和标点符号是否...