java怎么判定数据库表字段是否是主键

发布网友 发布时间：2022-04-07 19:09

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共2个回答

懂视网 时间：2022-04-07 23:30

通过各种查资料，并且阅读sqlserver自带的存储过程总结出来的

SELECT DISTINCT c.name AS tablename, a.name,a.is_nullable,dbo.GetRemoveParentheses(d.text) AS defaultvalue,
		CASE WHEN (a.name = index_col (c.name, f.index_id, 1) or
  a.name = index_col (c.name, f.index_id, 2) or
  a.name = index_col (c.name, f.index_id, 3) or
  a.name = index_col (c.name, f.index_id, 4) or
  a.name = index_col (c.name, f.index_id, 5) or
  a.name = index_col (c.name, f.index_id, 6) or
  a.name = index_col (c.name, f.index_id, 7) or
  a.name = index_col (c.name, f.index_id, 8) or
  a.name = index_col (c.name, f.index_id, 9) or
  a.name = index_col (c.name, f.index_id, 10) or
  a.name = index_col (c.name, f.index_id, 11) or
  a.name = index_col (c.name, f.index_id, 12) or
  a.name = index_col (c.name, f.index_id, 13) or
  a.name = index_col (c.name, f.index_id, 14) or
  a.name = index_col (c.name, f.index_id, 15) or
  a.name = index_col (c.name, f.index_id, 16))
		 THEN
		 1
		 ELSE
		 0
		 END
		 AS isPrimary
		 ,
 CASE a.precision
  WHEN 0
  THEN CASE a.is_ansi_padded
   WHEN 1
   THEN CONVERT(NVARCHAR(15), b.name + '('
   + CONVERT(NVARCHAR(10), a.max_length) + ')')
   WHEN 0 THEN b.name
  END
  ELSE CASE a.scale
   WHEN 0 THEN b.name
   ELSE b.name + '(' + CONVERT(NVARCHAR(10), a.precision) + ','
   + CONVERT(NVARCHAR(10), a.scale) + ')'
  END
 END AS typelength 
FROM sys.columns a
 LEFT JOIN sys.types b ON a.system_type_id = b.system_type_id
     AND a.user_type_id = b.user_type_id
		INNER JOIN sysobjects c ON c.id = a.object_id
		LEFT JOIN syscomments d ON d.id = a.default_object_id
		INNER JOIN sys.key_constraints e ON e.parent_object_id = a.object_id
		INNER JOIN sys.indexes f ON e.unique_index_id = f.index_id

WHERE c.xtype = 'u' AND f.is_primary_key = 1 

获取数据库所有列以及列的类型是否为空是否为默认值是否为主键

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热心网友 时间：2022-04-07 20:38