1. 查詢表結(jié)構(gòu)基本信息
select * from user_tables t,user_tab_comments c where c.table_name = t.table_name and t.table_name = '表名' |
2. 查詢表的所有列及其屬性
select t.COLUMN_NAME, t.DATA_TYPE, t.DATA_LENGTH, t.DATA_PRECISION, t.NULLABLE, t.COLUMN_ID, c.COMMENTS from user_tab_columns t, user_col_comments c where t.table_name = c.table_name and t.column_name = c.column_name and t.table_name = '表名' order by t.COLUMN_ID ; |
3 . 查找表的主鍵(包括名稱,構(gòu)成列)
select cu.*,c.DATA_TYPE from user_cons_columns cu, user_constraints au,user_tab_columns c where cu.constraint_name = au.constraint_name and c.COLUMN_NAME = cu.column_name and c.TABLE_NAME = cu.table_name and au.constraint_type = 'P' and au.table_name = '表名' |
4 . 查找表的所有索引(包括索引名,類型,構(gòu)成列)
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 and t.table_name = '表名' |
5.查找表的唯一性約束(包括名稱,構(gòu)成列)
select column_name from user_cons_columns cu, user_constraints au where cu.constraint_name = au.constraint_name and au.constraint_type = 'U' and au.table_name = '表名' |
6. 查找表的外鍵(包括名稱,引用表的表名和對應(yīng)的鍵名,下面是分成多步查詢)
select * from user_constraints c where c.constraint_type = 'R' and c.table_name = '表名' |
7. 查詢外鍵約束的列名
select * from user_cons_columns cl where cl.constraint_name = '外鍵名稱' |
8.查詢引用表的鍵的列名
select * from user_cons_columns cl where cl.constraint_name = '外鍵引用表的鍵名' |