oracle数据库中查询该某个表的主键被哪些表引用及该表中的外键来源于哪些表

1.oracle中查询某个表中的主键被哪些表引用的SQL语句：

SELECT
	c.TABLE_NAME
FROM
	all_constraints p,
	all_constraints c
WHERE
	p.table_name = '表名'
AND p. OWNER = SYS_CONTEXT ('USERENV', 'CURRENT_SCHEMA')
AND c. OWNER = SYS_CONTEXT ('USERENV', 'CURRENT_SCHEMA')
AND c.constraint_type = 'R'
AND p.CONSTRAINT_NAME = c.R_CONSTRAINT_NAME

注：表名要带上单引号

2.oracle中查询该表中的外键来源于哪些表的SQL语句：

SELECT
	cl.table_name
FROM
	user_cons_columns cl
LEFT JOIN user_constraints c ON cl.constraint_name = c.r_constraint_name
WHERE
	c.constraint_type = 'R'
AND c.table_name = '表名'