如果您可以使用类似ORM的实体框架。然后使用Linq to实体，您可以组合多个.Where语句，在执行时，这些语句将转换为sql语句。这允许您在执行实际查询之前创建和组合筛选器。无论您的筛选要求有多复杂，sql和c#代码都将变得非常简单，如果您只是像分隔多

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如果您可以使用类似ORM的实体框架。然后使用Linq to实体，您可以组合多个.Where语句，在执行时，这些语句将转换为sql语句。这允许您在执行实际查询之前创建和组合筛选器。无论您的筛选要求有多复杂，sql和c#代码都将变得非常简单，如果您只是像分隔多个where子句那样分隔where子句（在and之间），那么您的查询将更加高效。在临时表上有一堆子查询几乎肯定不是正确的解决方案。

SELECT * FROM People WHERE LastName = 'Bond'
SELECT * FROM [whatever was returned from above] WHERE FirstName = 'James'

SELECT * INTO #MyTempTable FROM People WHERE LastName = 'Bond'
SELECT * FROM #MyTempTable WHERE FirstName = 'James'

LastName = 'Bond'
FirstName = 'James'

var results = GetData(initialfilter);

results = results.Where( additionalFilter );

results = results.Where( thirdFilter );

SELECT * FROM (SELECT * FROM table2 WHERE LastName = 'Jones') WHERE FirstName = 'Bob'

private string BuildMyQuery(List<string> myStatements)
{
   // myHoldingTable1 will always contain the last result

   var sb = new StringBuilder();
   sb.AppendLine("DECLARE @myHoldingTable1 TABLE (Id int, Value1 varchar(100), ...);");
   sb.AppendLine("DECLARE @myHoldingTable2 TABLE (Id int, Value1 varchar(100), ...);");
   sb.AppendLine("INSERT INTO @myHoldingTable1 (Id, Value1 ....) SELECT id, value1... from myInitialTable;");
   foreach(var myStatement IN myStatements)
   {
      sb.AppendLine($"INSERT INTO @myHoldingTable2 (Id, Value1 ....) myStatement;");
      sb.AppendLine("DELETE FROM @myHoldingTable1;");
      sb.AppendLine("INSERT INTO @myHoldingTable1 (Id, Value1 ....) SELECT id, value1... from @myHoldingTable2;");
      sb.AppendLine("DELETE FROM @myHoldingTable2;");

   }

   sb.AppendLine("SELECT * FROM @myHoldingTable1;");
   return sb.ToString();
}