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SQL Server database how to add modify delete field description, many novices are not very clear about this, in order to help you solve this problem, the following editor will explain in detail for you, people with this need can come to learn, I hope you can gain something.

SQLServer database field description of how to add, modify and delete

1. Query field descriptions for two tables

SELECTt. [name] AS [table name], c. [name] AS [field name], cast (ep.[ value] asvarchar) AS [field description] FROMsys.tablesAStINNERJOINsys.columnsAScONt.object_id=c.object_idLEFTJOINsys.extended_propertiesASepONep.major_id=c.object_idANDep.minor_id=c.column_idWHEREep.class= 1andt.[ name] = 'table2' and c. [name] in (' table2 field', 'table2 field') orc. [name] in ('table1 field 'table1 field')

two。 Add the name of the field

EXECsys.sp_addextendedproperty@name=N'MS_Description',@value=N' field description', @ level0type=N'SCHEMA',@level0name=N'dbo',@level1type=N'TABLE',@level1name=N' table name', @ level2type=N'COLUMN',@level2name=N' field name'GO

SQLServer database field description of how to add, modify and delete

3. Modify the name of the field

BEGINTRANSACTIONGODECLARE@vsql_variantSET@v=N' description message 'EXECUTEsys.sp_updateextendedpropertyN'MS_Description',@v,N'SCHEMA',N'dbo',N'TABLE',N' table name, name of the field named' GOCOMMIT'

4. Query database field information and types

Selecta.nameaszdname,a.length,b.nameaszdtypefromsyscolumnsa,systypesb,sysobjectscwherea.xtype=b.xtypeanda.id=c.idandc.name='table'-- did not filter the system field information selecta.namerea.accounthreb.namefromsyscolumnsaptyesb.xtypeanda.objectscscwherea.xtype.xtypeanda.roomc.idandc.namefields, tablefields, ANDB.namemade fields, filtering system field information selecta.name,a.length,b.namefromsyscolumnsa,systypesb,sysobjectscwherea.xtype=b.xtypeanda.id=c.idandc.name='table'andcharindex ('sysname'') B.name) = 0mi-system field information is filtered.

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