Question

我是Firebird的新手，我在将这个T-SQL转换为Firebird SQL时遇到了特别困难。此代码存储在数据库之外，而不是存储过程中。

DECLARE @NumTotal int
DECLARE @NumUsed int

SELECT @NumTotal = COUNT(*)
    FROM "some_Table"
    WHERE "CreatedOn"=@CreatedOn

SELECT @NumUsed = COUNT(*)
    FROM "some_Table"
    WHERE "CreatedOn"=@CreatedOn AND "UserID" IS NOT NULL

SELECT @NumUsed AS "NumUsed", @NumTotal AS "NumTotal"

我想从错误和我的实验中我基本上不得不以某种方式将它放入存储过程中。有没有办法在保持代码不在数据库的同时做到这一点？

Answer 1

您的代码可以简化为单个查询：

SELECT COUNT(*) AS numTotal,
       (SELECT COUNT(*)
          FROM YOUR_TABLE
         WHERE userid IS NOT NULL
           AND createdon = @createdon) AS numUsed
  FROM YOUR_TABLE
 WHERE createdon = @createdon

使用双引号是ANSI用于转义异常字符，我在示例中没有看到这些字符。

无法将SQL Server查询转换为Firebird

1 个答案: