oracle 查询唯一键,ORACLE: 查询(看)表的主键、外键、唯一性约束 和 索引

你可以使用如下语句查询表的主键、外键、唯一性约束和索引：

查询主键：

SELECT cols.table_name, cols.column_name, cols.position, cons.status, cons.owner
FROM all_constraints cons, all_cons_columns cols
WHERE cols.table_name = '表名'
AND cons.constraint_type = 'P'
AND cons.constraint_name = cols.constraint_name
AND cons.owner = cols.owner
ORDER BY cols.table_name, cols.position;

查询外键：

SELECT cols.table_name, cols.column_name, cols.position, cons.status, cons.owner
FROM all_constraints cons, all_cons_columns cols
WHERE cols.table_name = '表名'
AND cons.constraint_type = 'R'
AND cons.constraint_name = cols.constraint_name
AND cons.owner = cols.owner
ORDER BY cols.table_name, cols.position;

查询唯一性约束：

SELECT cols.table_name, cols.column_name, cols.position, cons.status, cons.owner
FROM all_constraints cons, all_cons_columns cols
WHERE cols.table_name = '表名'
AND cons.constraint_type = 'U'
AND cons.constraint_name = cols.constraint_name
AND cons.owner = cols.owner
ORDER BY cols.table_name, cols.position;

查询索引：

SELECT index_name, uniqueness, table_name, column_name, column_position
FROM all_ind_columns
WHERE table_name = '表名'
ORDER BY index_name, column_position;

其中，'表名'为你要查询的表的名称。