Oracle 判断为空 all space

标签：bms   HERE   however   use   判断为空   pre   product   pac   acl   

You can use trim on the column.

where trim(product_type) is null

The above is not DBMS-independent, since Sybase does not provide the trim function. However, the below approach will work both in Sybase and Oracle:

where rtrim(ltrim(product_type)) is null

Oracle 判断为空 all space

标签：bms   HERE   however   use   判断为空   pre   product   pac   acl   

原文地址：https://www.cnblogs.com/kakaisgood/p/10059883.html