Oracle查询表的索引、主键、唯一约束、外键等

查看表的名称及注释

SELECT
        TABLE_NAME,
        COMMENTS
FROM
        all_tab_comments
WHERE
        OWNER = '数据库schema名称'
        AND 
        TABLE_NAME LIKE '%表名%'
ORDER BY TABLE_NAME

查找表的索引

SELECT
	T.*,
	I.INDEX_TYPE
FROM
	USER_IND_COLUMNS T,
	USER_INDEXES I
WHERE
	T.INDEX_NAME = I.INDEX_NAME
	AND T.TABLE_NAME = I.TABLE_NAME
		----指定表
	AND T.TABLE_NAME = '表名'

查找表的唯一约束

SELECT
DISTINCT 
	CU.COLUMN_NAME,
	AU.TABLE_NAME,
	AU.OWNER
FROM
	DBA_CONS_COLUMNS CU,
	DBA_CONSTRAINTS AU
WHERE
	CU.CONSTRAINT_NAME = AU.CONSTRAINT_NAME
	AND AU.CONSTRAINT_TYPE = 'U'
	-----指定用户名
	AND AU.OWNER = '数据库名'
	-----指定表名
	AND AU.TABLE_NAME = '表名'
ORDER BY cu.COLUMN_NAME ASC;

查找表的外键

SELECT 
c.OWNER AS "数据库",
c.CONSTRAINT_NAME AS "约束名称",
c.CONSTRAINT_TYPE AS "约束类型",
c.TABLE_NAME AS "表名",
cl.COLUMN_NAME AS "字段名"
FROM 
user_constraints c,
user_cons_columns cl
WHERE  
c.CONSTRAINT_NAME = cl.CONSTRAINT_NAME 
AND c.constraint_type = 'R' 
AND c.table_name='表名'

参考

Oracle查看表索引、主键、外键、约束

https://www.cnblogs.com/hushaojun/p/16368886.html

oracle查询表信息（索引，外键，列等）
https://blog.csdn.net/weixin_43728713/article/details/113971688