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Cx orAClE sElECt in

查询数据字典获取列名信息: select * from user_tab_columns where table_name = your_table_name 用存储过程把纵向的列名转为横向的列名串,然后与数据合起来,这一步自己想了

由于ORACLE不支持SELECT TOP语句,所以在ORACLE中经常是用ORDER BY跟ROWNUM的组合来实现SELECT TOP N的查询 http://huibin.iteye.com/blog/419780

cursor.execute('select * from INV.MTL_ITEM_REVISIONS where ROW_ID= %s'% (Item,)) 换为: qry_sql = "select * from INV.MTL_ITEM_REVISIONS where ROW_ID= '%s'" % Item cursor.execute(qry_sql)

select 1 from table 与Select * from table在用法上大同小异,具体不同分析见下文: 1、select 1 from mytable;与select anycol(目的表集合中的任意一行) from mytable;与select * from mytable 作用上来说是没有差别的,都是查看是否有记录,...

您好,很高兴为您解答。 insert into select可以将select 出来的N行(0到任意数)结果集复制一个新表中,select into from只能将"一行"结果复制到一个变量中。这样说吧,select into是PL/SQL language 的赋值语句。而前者是标准的SQL语句。 做一个...

select * from table where id in (select id from table union all select '2' from dual) 或者 select * from table where id in (select id from table) union select * from table where id = '2'

简单的可以这样解决 a IN (1,2,...,999) or a in (1000,1001,...1999) or .... 或者将in里的存放到一个临时表里,再关联查询!如: with t as ( select 1 id from dual union all ... select 199999 id from dual) select ... from 表 where a in (...

oracle的sql语句中没有limit,limit是mysql中特有的,在oracle中可用rownum来表示,用于查询结果中的前N行数据。 如要查询emp表中的前5行数据,可用如下语句: select * from emp where rownum

直接建相同的表create table students_backup as select * from students; 直接建相同的表结构create table students_backup as select * from students where 1=2; 如果建好了表insert into students_backup select * from students

limit是mysql里的,select * from a order by b limit 6,1,取得按b排序的第6行a的值 而在oracle中想要实现是通过rownum: select * from a where rownum

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