SQL 查询所有表名/指定表名、字段、类型、大小

SQL 查询所有表名/指定表名、字段、类型、大小

1、查询所有表名：

MS SQL

SELECT NAME FROM SYSOBJECTS WHERE TYPE='U'

MySQL　　

SELECT * FROM INFORMATION_SCHEMA.TABLES

Oracle

SELECT TABLE_NAME FROM USER_TABLES

ACCESS

SELECT NAME FROM MSYSOBJECTS WHERE TYPE=1 AND FLAGS=0

2、查询表的所有字段名：
MS SQL

SELECT NAME FROM SYSCOLUMNS WHERE ID=OBJECT_ID(' 表名' )

MySQL　　

SELECT * FROM INFORMATION_SCHEMA.TABLES
SELECT * FROM INFORMATION_SCHEMA.VIEWS
SELECT * FROM INFORMATION_SCHEMA.COLUMNS

3、查询所有表名/指定表名、字段、类型、大小

MS SQL

1、所有表

select t.name as tablename,c.name as columnname,ty.name as typename,
c.max_length as typelength
from sys.columns c inner join sys.tables t on t.object_id=c.object_id
inner join sys.types ty on ty.system_type_id=c.system_type_id
order by t.name,c.column_id

2、指定表　　

select b.name as tablename,a.name as columnname,c.name as typename,a.max_length as typelength
from sys.columns a inner join sys.tables b on b.object_id=a.object_id
inner join sys.types c on c.system_type_id=a.system_type_id
where b.name='表名'
order by b.name,a.column_id

 

　　

 

 

 

创建时间：2021.05.11　　更新时间：2021.06.07　　2021.12.31