如何确定字段是否为数字并转换为相同的where子句

Question

我有以下简单的sql

SELECT TOP 1000 *
  FROM CallRecords
  where clientId = 4 and 
  resultcodeId > 1 and
  ISNUMERIC(extension) = 1 and 
  Convert(int,extension) > 72320 and Convert(int,extension) < 73000

我收到以下错误

Msg 245, Level 16, State 1, Line 2
Conversion failed when converting the nvarchar value 'b01004957003' to data type int.

显然，一个扩展名包含＆＃39; b01004957003＆＃39;

但是我认为sql会在ISNUMERIC（扩展名）= 1

之后停止检查

任何线索？

Answer 1

尝试将转换保留在外部查询

中

SELECT *
FROM   (SELECT TOP 1000 *
        FROM   CallRecords
        WHERE  clientId = 4
               AND resultcodeId > 1
               AND Isnumeric(extension) = 1) A
WHERE  CONVERT(INT, extension) > 72320
       AND CONVERT(INT, extension) < 73000