查询库中的CHECK约束信息的两个视图（SQLSERVER）

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以下两个视图均基于系统表sysobjects、syscomments和系统视图sysconstraints，查询结果中包括表ID、表名、列ID、列名、CHECK约束ID、CHECK约束名、CHECK约束status值以及CHECK约束的内容，TCCView为Table-Column-CHECKView，结果中均为列级CHECK约束，TCView为Table-CHECKView，结果中均为表级CHECK约束。

关于字段status的值的作用，参见不用企业管理器的情况下得知CHECK约束的属性设置一文。

下面是两个视图的代码，可用于SQLSERVER2000中的任意数据库中。

TCCView：
SELECTTOP100PERCENTa.idAStableid,a.tablename,a.colid,a.columnname,
     a.datatype,a.length,b.constidASCHECKid,b.CHECKname,b.status,b.content
FROM(SELECTsysobjects.nameAStablename,sysobjects.id,
             syscolumns.nameAScolumnname,syscolumns.colid,
             systypes.nameASdatatype,syscolumns.lengthASlength
       FROMsysobjects,syscolumns,systypes
       WHEREsysobjects.xtype='u'ANDsysobjects.id=syscolumns.idAND
             syscolumns.xtype=systypes.xtypeAND
             systypes.xtype=systypes.xusertypeANDsysobjects.status>0)
     aLEFTOUTERJOIN
         (SELECTsysobjects.nameCHECKname,sysobjects.status,sysconstraints.constid,
              sysconstraints.id,sysconstraints.colid,syscomments.textAScontent
        FROMsysobjects,sysconstraints,syscomments
        WHERExtype='c'ANDsysobjects.id=sysconstraints.constidAND
              sysconstraints.constid=syscomments.id)bONa.id=b.idAND
     a.colid=b.colid
ORDERBYa.tablename,a.columnname,b.CHECKname

TCView：
SELECTa.idAStableid,a.tablename,b.constidASCHECKid,b.CHECKname,b.status,
     b.content
FROM(SELECTsysobjects.id,sysobjects.nameAStablename
       FROMsysobjects
       WHEREsysobjects.xtype='u'ANDsysobjects.status>0)aLEFTOUTERJOIN
         (SELECTsysobjects.nameCHECKname,sysobjects.status,sysconstraints.constid,
              sysconstraints.id,sysconstraints.colid,syscomments.textAScontent
        FROMsysobjects,sysconstraints,syscomments
        WHERExtype='c'ANDsysobjects.id=sysconstraints.constidAND1
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