DB별 빈 테이블에서 최대값을 구하는 쿼리

레코드가 없어 최대값을 구할때 NULL 처리가 필요한 경우 아래처럼 처리

ORACLE
select max(seq) from board

MYSQL
select COALESCE(max(seq),0) from board;

MSSQL

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s