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 ...
问Oracle SQL不同的where子句with case whenEN愚蠢的问题，因为我想用where子句的两个选项开始一条select...
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...
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
此参数指定在导入导出时的限制条件,和SQL语句中的 "where" 语句是一样儿一样儿滴 语法 QUERY=([schema.] [table_name:] query_clause, [schema.] [table_name:] query_clause,……) CONTENT=METADATA_ONLY, EXTIMATE_ONLY=Y,TRANSPORT_TABLESPACES. ...
There’s noifkeyword in SQL. If you want to doif-else-thenlogic inselect,whereor anywhere else in a statement, you need acaseexpression. This is a series ofwhenclauses that thedatabaseruns in order: For example, if you want to map exam correct percentages to grade letters according to...
--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。 begin update empsetENAME='ALEARK'WHERE EMPNO=7469;ifsql%isopen then dbms_output.put_line('Openging');elsedbms_output.put_line('closing'); ...
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 ...
2.3 Starting and Leaving SQLcl Logging In and Logging Out Use the following commands to log in to and out of SQLcl. SQLCL [[option] [logon | / NOLOG] [start]] where option has the following syntax: -H[ELP] | -V[ERSION] | [ [-C[OMPATIBILITY] x.y[.z]]] [-L[OGON]]...
You can specify the type of SQL statement to create. Accept the default to create a SELECT statement and click Apply.4 . Your SELECT statement is displayed. You can modify it in the SQL Worksheet and run it. 5 .Add the WHERE clause ...