Question

我们可以在Update

中执行多个SQL Server语句吗？

。我试过但发生了SQL Server错误。

错误

ORA-00907：缺少右括号

示例

UPDATE FACULTY SET Salary=(
12000 WHERE Faculty_ID=0163,
8,500 WHERE Faculty_ID=0164,
14,500 WHERE Faculty_ID=0165,
10,000 WHERE Faculty_ID=0166
);

Answer 1

使用CASE声明

UPDATE FACULTY
SET    Salary = CASE
                  WHEN Faculty_ID = '0163' THEN 12000
                  WHEN Faculty_ID = '0164' THEN 8500
                  WHEN Faculty_ID = '0165' THEN 14500
                  WHEN Faculty_ID = '0166' THEN 10000
                END
WHERE  Faculty_ID IN ( '0163', '0164', '0165', '0166' )

考虑到您不想更新其他Faculty_ID's

Answer 2

我建议只写四个更新语句：

UPDATE FACULTY SET Salary = 12000 WHERE Faculty_ID = 0163;
UPDATE FACULTY SET Salary = 8500 WHERE Faculty_ID = 0164;
UPDATE FACULTY SET Salary = 14500 WHERE Faculty_ID = 0165;
UPDATE FACULTY SET Salary = 10000 WHERE Faculty_ID = 0166;

尽管您可以在一个语句中执行此操作，但逻辑更复杂，容易出错并且难以维护。使用Faculty_ID上的索引，四个查询的开销应该非常小。

注意数字和字符串。 SQL不会将逗号识别为数字中的分隔符，因此请勿使用它。此外，id中的前导零对于数字是不必要的。如果Faculty_ID是字符串，则使用单引号。

Oracle中的多个更新声明

2 个答案: