Question

问题在这里。我正在创建一个存储过程，我想确定其中一个列是否没有数据，然后它将跳过该行。

示例：表名：Employee

Employee No | Employee Name | Card No | Salary 
1           | test 1        | 123     | 
2           | Simon         |         |  2000        
3           |               | 456     |  4000
4           | test3         | 342     |  5000
5           |               | null    |  3000

它只会读取包含employeeno = 4，name = test3，card no = 3432和salary = 5000的完整数据的行。

Answer 1

使用IS NOT NULL和LEN()。

试试这个：

SELECT *
FROM Employee
WHERE (EmployeeNo IS NOT NULL OR LEN(EmployeeNo) > 0) AND
      (EmployeeName IS NOT NULL OR LEN(EmployeeName) > 0) AND
      (CardNo IS NOT NULL OR LEN(CardNo) > 0) AND
      (Salary IS NOT NULL OR LEN(Salary) > 0)

Answer 2

你可以使用isnull（），如：

SELECT *
  FROM Employee
 WHERE 
   ISNULL(EmployeeNo,'') != ''
   AND ISNULL(EmployeeName,'') != ''
   AND ISNULL(CardNo, '') != ''
   AND ISNULL(Salary, '') != ''

它会检查两个案例的空格和''。

Answer 3

使用过滤器如，

SELECT *
  FROM Employee
 WHERE EmployeeNo IS NOT NULL
   AND EmployeeName IS NOT NULL
   AND CardNo IS NOT NULL
   AND Salary IS NOT NULL

如果未在存储过程中找到数据，则跳过字段

3 个答案: