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alter table docdsp add dspcode char(200)
alter table tbl add meet_group int2
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ALTER TABLE table_NAME DROP COLUMN column_NAME
3.ÐÞ¸Ä×Ö¶ÎÀàÐÍ
ALTER TABLE table_name ALTER COLUMN column_name new_data_type
4.sp_rename ¸ÄÃû
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sp_rename [ @objname = ] 'object_name' ,
[ @newname = ] 'new_name'
[ , [ @objtype = ] 'object_type' ]
È磺EXEC sp_rename 'newname','PartStock'
5.sp_help ÏÔʾ±íµÄһЩ»ù±¾Çé¿ö
sp_help 'object_name' È磺EXEC sp_help 'PartStock'
6.ÅжÏijһ±íPartStockÖÐ×Ö¶ÎPartVelocityÊÇ·ñ´æÔÚ
if exists (select * from syscolumns where id=object_id('PartStock') and name='PartVelocity')
print 'PartVelocity exists'
else print 'PartVelocity not exists'
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select count(*) from sysobjects where type='U' and name='ÄãµÄ±íÃû'
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select count(*) from syscolumns
where id = (select id from sysobjects where type='U' and name='ÄãµÄ±íÃû')
and name = 'ÄãÒªÅжϵÄ×Ö¶ÎÃû'
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if exists(select 1 from sysobjects where parent_obj=object_id('tb') and xt
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create table tablename as select * from table_src;
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