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select * from sysobjects where xtype=¡¯u¡¯

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SQL code:
exec sp_tables @table_TYPE='''system table''' --ϵͳ±í
exec sp_tables @table_TYPE='''table''' --Óû§±í


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EXEC sp_tables syscolumns, dbo, Company, "'SYSTEM TABLE'"


SQL code:
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sp_tables [ [ @table_name = ] 'name' ]
[ , [ @table_owner = ] 'owner' ]
[ , [ @table_qualifier = ] 'qualifier' ]
[ , [ @table_type = ] "type" ]
[ , [@fUsePattern = ] 'fUsePattern'];


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[ @table_name =] 'name'
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[ @table_owner = ] 'owner'
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DECLARE @STR NVARCHAR(MAX)
SET @STR='SELECT * from SALE_PROD'
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