查询DM数据库所有表的各种约束和索引
--查询主键
SELECT a.OWNER as "模式名",a.TABLE_NAME as "表名",b.COLUMN_NAME as "列名", a.CONSTRAINT_NAME as "约束名"
from DBA_CONSTRAINTS a, ALL_CONS_COLUMNS b where a.CONSTRAINT_NAME=b.CONSTRAINT_NAME and CONSTRAINT_TYPE='P';
--查询外键
SELECT a.OWNER as "模式名",a.TABLE_NAME as "表名",b.COLUMN_NAME as "列名", a.CONSTRAINT_NAME as "约束名"
from DBA_CONSTRAINTS a, ALL_CONS_COLUMNS b where a.CONSTRAINT_NAME=b.CONSTRAINT_NAME and CONSTRAINT_TYPE='R';
--查询唯一约束
SELECT a.OWNER as "模式名",a.TABLE_NAME as "表名",b.COLUMN_NAME as "列名", a.CONSTRAINT_NAME as "约束名"
from DBA_CONSTRAINTS a, ALL_CONS_COLUMNS b where a.CONSTRAINT_NAME=b.CONSTRAINT_NAME and CONSTRAINT_TYPE='U';
--查询check约束
SELECT a.OWNER as "模式名",a.TABLE_NAME as "表名",b.COLUMN_NAME as "列名", a.CONSTRAINT_NAME as "约束名",SEARCH_CONDITION as "CHECK约束的条件"
from DBA_CONSTRAINTS a, ALL_CONS_COLUMNS b where a.CONSTRAINT_NAME=b.CONSTRAINT_NAME and CONSTRAINT_TYPE='C';
--查询默认列
SELECT OWNER as "模式名",TABLE_NAME as "表名",COLUMN_NAME as "列名",DATA_TYPE as "列类型",DATA_DEFAULT as "默认值" FROM DBA_TAB_COLUMNS WHERE DATA_DEFAULT IS NOT NULL;
--查询非空列
SELECT OWNER as "模式名",TABLE_NAME as "表名",COLUMN_NAME as "列名",DATA_TYPE as "列类型" FROM DBA_TAB_COLUMNS WHERE NULLABLE ='Y';
--查询索引
SELECT TABLE_OWNER as "模式名",TABLE_NAME as "表名",COLUMN_NAME as "列名",INDEX_NAME as "索引名" from DBA_IND_COLUMNS WHERE TABLE_OWNER='T1';
参考： https://blog.csdn.net/weixin_44312518/article/details/117326846
标签：NAME,CONSTRAINT,COLUMN,数据库,索引,SELECT,OWNER,TABLE,达梦 From： https://www.cnblogs.com/aaacarrot/p/17084012.html