1. 查詢表結構基本信息spa
select * from user_tables t,user_tab_comments c索引 where c.table_name = t.table_nameci and t.table_name = '表名'table |
2. 查詢表的全部列及其屬性select
select t.COLUMN_NAME,引用 t.DATA_TYPE,查詢 t.DATA_LENGTH,tab t.DATA_PRECISION,di t.NULLABLE,co 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 . 查找表的全部索引(包括索引名,類型,構成列)
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.查找表的惟一性約束(包括名稱,構成列)
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的鍵名,下面是分紅多步查詢)
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' |