使用sql命令生成数据字典

使用sql命令生成数据字典。

sqlserver

 
SELECT 
表名 = CASE WHEN A.COLORDER=1 THEN D.NAME ELSE '' END,
表备注 = CASE WHEN A.COLORDER=1 THEN ISNULL(F.VALUE,'') ELSE '' END,
列序号 = A.COLORDER,
列名称 = A.NAME,
标识 = CASE WHEN COLUMNPROPERTY(A.ID,A.NAME,'ISIDENTITY')=1 THEN '√ ' ELSE '' END,
主键 = CASE WHEN EXISTS(SELECT 1 FROM SYSOBJECTS WHERE XTYPE='PK' AND PARENT_OBJ=A.ID AND NAME IN (
SELECT NAME FROM SYSINDEXES WHERE INDID IN(
SELECT INDID FROM SYSINDEXKEYS WHERE ID=A.ID AND COLID=A.COLID))) THEN '√' ELSE '' END,
类型 = B.NAME,
字节 = A.LENGTH,
长度 = COLUMNPROPERTY(A.ID,A.NAME,'PRECISION'),
小数位 = ISNULL(COLUMNPROPERTY(A.ID,A.NAME,'SCALE'),0),
允许空 = CASE WHEN A.ISNULLABLE=1 THEN '√ 'ELSE '' END,
默认值 = ISNULL(E.TEXT,''),
列备注 = ISNULL(G.[VALUE],'')
FROM 
SYSCOLUMNS A
LEFT JOIN SYSTYPES B ON A.XUSERTYPE=B.XUSERTYPE
INNER JOIN SYSOBJECTS D ON A.ID=D.ID AND D.XTYPE='U ' --AND D.NAME<>'DTPROPERTIES'
LEFT JOIN SYSCOMMENTS E ON A.CDEFAULT=E.ID
LEFT JOIN sys.extended_properties G ON A.ID=G.major_id AND A.COLID=G.minor_id   
LEFT JOIN sys.extended_properties F ON D.ID=F.major_id AND F.minor_id=0
--where D.NAME='tbname'   --查询这个表
ORDER BY A.ID,A.COLORDER 

mysql

select	
	c.table_name as 表名,
    t.TABLE_COMMENT as 表名描述,
    c.column_name as 字段名称,
    c.column_type as 数据类型,
	c.DATA_TYPE AS 字段类型,
	c.CHARACTER_MAXIMUM_LENGTH AS 长度,
 
	c.COLUMN_DEFAULT as 默认值,
    if(c.column_key = 'PRI','Y','N') as 主键,
    if(c.is_nullable='no','Y','N') as 非空,
    c.column_comment as 注释
from
	information_schema.columns c
left join
	information_schema.tables t
on c.table_name=t.table_name 
	where c.TABLE_SCHEMA='XXXX' -- 指定库
	and t.TABLE_SCHEMA='XXXX' -- 指定库
	-- and c.table_name like 'abc_%'  -- 我这里是导出以abc_开头的表  

生成后，导出数据到excel即可。