1.Oracle CASE WHEN 用法介绍 2.https://dba.stackexchange.com/questions/1170/oracle-sql-case-in-a-where-clause 本文参与 腾讯云自媒体同步曝光计划,分享自作者个人站点/博客。 原始发表:2017-12-29 ,如有侵权请联系 cloudcommunity@tencent.com 删除 前往查看 其他 ...
...附录:参考资料 1.Oracle CASE WHEN 用法介绍 2.https://dba.stackexchange.com/questions/1170/oracle-sql-case-in-a-where-clause 26910 Oracle 与 MySQL 的差异分析(8):其他常用函数 Oracle 与 MySQL 的差异分析(8):其他常用函数 1 NVL 1.1Oracle nvl(a, b):如果a不为null,返回a,否则返回b。......
这种方法也是在特殊情况下使用,要多注意逻辑,不要弄错。 附录:参考资料 1.Oracle CASE WHEN 用法介绍 2.https://dba.stackexchange.com/questions/1170/oracle-sql-case-in-a-where-clause
貌似只有Oracle提供该函数,而且不支持ANSI SQL,语法上也没CASE WHEN清晰,个人不推荐使用。 3.2 在WHERE中特殊实现 SELECTT2.*, T1.*FROMT1, T2WHERE( T2.COMPARE_TYPE='A'ANDT1.SOME_TYPELIKE'NOTHING%')OR(T2.COMPARE_TYPE!='A'ANDT1.SOME_TYPENOTLIKE'NOTHING%') 1. 2. 3. 4. 5. 这种方法也是...
attribute = 'Full Run'时将Where子句中的独特列与其自身进行比较(始终为true),并在case表达式中将...
oracle WHERE子句中存在CASE WHEN您目前的查询是正确的,可以透过exists执行此作业。以下是使用左链接的...
name_clause指定名称的语句,如果不具体指定是哪个对象,则此类所有对象都不导出, select 语句中表名不要加用户名。用户名,通过schemas 指定。 示例 expdp scott/tiger DIRECTORY=dump_dir DUMPFILE=halberd.dup EXCLUDE=VIEW expdp scott/tiger DIRECTORY=dump_dir DUMPFILE=halberd.dup EXCLUDE=TABLE:\" IN\(\'TEM...
You can use acaseexpression like this: The database processes the expression from top-to-bottom. It returns the value for the firstwhenclause that is true. If none are true (the percentage is less than 50 or null), it returns the value in theelseclause which is F. ...
the salary of the employee, but notice that some conditions have been added based on what department number the employee is in. You can see that a searched case statement can have many different when clauses, and that you can apply many criteria in those clauses to get the answers you ...
exit when c_job%notfound; dbms_output.put_line(c_row.empno||'-'||c_row.ename||'-'||c_row.job||'-'||c_row.sal); end loop;--关闭游标 close c_job; end; --1:任意执行一个update操作,用隐式游标sql的属性%found,%notfound,%rowcount,%isopen观察update语句的执行情况。