sqlserver2008
(1)查询所有的数据库名字：
use master;
select * from sysdatabases;
(2)查询指定库中用户建的的所有表：
select t.name from [指定库]..sysobjects t where xtype=‘u‘ and status>=0
(3)查询指定表的描述：
select a.name as table_name,b.name as column_name,cast(isnull(c.[value],‘‘) as varchar(23)) as comments
from sys.tables a inner join sys.columns b on b.object_id=a.object_id left join sys.extended_properties c on c.major_id=b.object_id and c.minor_id=b.column_id where a.name= ‘指定表‘;
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mysql
(1)把某个表中查询的记录插入另一张表：
insert into 某库名.表名(guId,gxId,loginName,userName,phone,telephone,email,Duties,Type,createDate,serino,idnum,sex,birth,grade,status,oldid)
select UUID(),oid,name,name,phone,phone,‘‘,Position,‘3‘,‘‘,‘‘,Idcard,‘‘,‘‘,‘‘,‘‘,‘‘ from 某库名.另一表名;