关于DM达梦数据库，获取数据表结构信息、数据表创建语句、主键等信息的sql

1、获取数据表中的字段名、类型、长度、描述

 select name,reftype,length,descrip from (
select distinct A.COLUMN_ID as id, A.column_name name,A.data_type reftype,A.data_length as length,B.comments descrip 
from user_tab_columns A,user_col_comments B ,all_cons_columns C,USER_TAB_COMMENTS D  where a.COLUMN_NAME=b.column_name and A.Table_Name = B.Table_Name 
 and A.Table_Name = D.Table_Name and (A.TABLE_NAME=c.table_name) and  A.Table_Name='tablename' ORDER BY id )

2、获取数据表创建语句

 schname：模式名 tablename：表名
 
 call SP_TABLEDEF(schname,tablename)

3、获取数据表主键信息

Select  col.column_name from all_constraints con,all_cons_columns col where
 con.constraint_name=col.constraint_name and con.constraint_type='P' and col.table_name='tablename'

 

 

本文地址：https://blog.csdn.net/xsfqh/article/details/108999361