可以使用以下命令创建包含一列和一行的表:
select 'create' as col from dual;
这可以用于构建表连接:
with a as (select 'create' as ac from dual),b as (select 'delete' as bc from dual) select * from a left outer join b on (ac = bc);
现在我想要两行.我是这样做的:
select 'create' as col from dual union select 'delete' as col from dual;
但是有一个更紧凑的符号吗?我试过了
select ('create','delete') as col from dual;
但它不起作用.
例如,您可以使用集合类型和TABLE运算符(适用于Oracle 10g):
SQL> SELECT column_value FROM TABLE(SYS.ODCIVARCHAR2LIST('abc','def','ghi')); COLUMN_VALUE -------------------------------------------------------------------------------- abc def ghi
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