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  • sql server 约束 查找

    --1.主键约束
    SELECT
      tab.name AS [表名],
      idx.name AS [主键名称],
      col.name AS [主键列名]
    FROM
      sys.indexes idx
        JOIN sys.index_columns idxCol 
          ON (idx.object_id = idxCol.object_id 
              AND idx.index_id = idxCol.index_id 
              AND idx.is_primary_key = 1)
        JOIN sys.tables tab
          ON (idx.object_id = tab.object_id)
        JOIN sys.columns col
          ON (idx.object_id = col.object_id
              AND idxCol.column_id = col.column_id);
              
    --2.唯一约束
    SELECT
      tab.name AS [表名],
      idx.name AS [约束名称],
      col.name AS [约束列名]
    FROM
      sys.indexes idx
        JOIN sys.index_columns idxCol 
          ON (idx.object_id = idxCol.object_id 
              AND idx.index_id = idxCol.index_id 
              AND idx.is_unique_constraint = 1)
        JOIN sys.tables tab
          ON (idx.object_id = tab.object_id)
        JOIN sys.columns col
          ON (idx.object_id = col.object_id
              AND idxCol.column_id = col.column_id);
              
     --3.外键约束
     select
      oSub.name  AS  [子表名称],
      fk.name AS  [外键名称],
      SubCol.name AS [子表列名],
      oMain.name  AS  [主表名称],
      MainCol.name AS [主表列名]
    from
      sys.foreign_keys fk  
        JOIN sys.all_objects oSub  
            ON (fk.parent_object_id = oSub.object_id)
        JOIN sys.all_objects oMain 
            ON (fk.referenced_object_id = oMain.object_id)
        JOIN sys.foreign_key_columns fkCols 
            ON (fk.object_id = fkCols.constraint_object_id)
        JOIN sys.columns SubCol 
            ON (oSub.object_id = SubCol.object_id  
                AND fkCols.parent_column_id = SubCol.column_id)
        JOIN sys.columns MainCol 
            ON (oMain.object_id = MainCol.object_id  
                AND fkCols.referenced_column_id = MainCol.column_id)
                
                
                
                
     --4.Check约束
     SELECT
      tab.name AS [表名],
      chk.name AS [Check约束名],
      col.name AS [列名],
      chk.definition
    FROM
      sys.check_constraints chk
        JOIN sys.tables tab
          ON (chk.parent_object_id = tab.object_id)
        JOIN sys.columns col
          ON (chk.parent_object_id = col.object_id
              AND chk.parent_column_id = col.column_id)
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  • 原文地址:https://www.cnblogs.com/accumulater/p/6807692.html
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