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批量更改MySQL中特定字段的所有条目？

2024-04-25 16:02:04 471

让我们首先创建一个演示表-

mysql> create table BulkChangeDemo
   -> (
   -> CustomerId int NOT NULL AUTO_INCREMENT PRIMARY KEY,
   -> CustomerName varchar(20),
   -> isEducated boolean
   -> );

使用insert命令在表中插入一些记录。查询如下-

mysql> insert into BulkChangeDemo(CustomerName,isEducated) values('Larry',true);
mysql> insert into BulkChangeDemo(CustomerName,isEducated) values('John',false);
mysql> insert into BulkChangeDemo(CustomerName,isEducated) values('Carol',false);
mysql> insert into BulkChangeDemo(CustomerName,isEducated) values('Mike',true);
mysql> insert into BulkChangeDemo(CustomerName,isEducated) values('David',false);
mysql> insert into BulkChangeDemo(CustomerName,isEducated) values('Bob',false);

使用select语句显示表中的所有记录。查询如下-

mysql> select *from BulkChangeDemo;

这是输出-

+------------+--------------+------------+
| CustomerId | CustomerName | isEducated |
+------------+--------------+------------+
|          1 | Larry        | 1          |
|          2 | John         | 0          |
|          3 | Carol        | 0          |
|          4 | Mike         | 1          |
|          5 | David        | 0          |
|          6 | Bob          | 0          |
+------------+--------------+------------+
6 rows in set (0.00 sec)

以下是查询以批量更改特定字段的所有条目-

mysql> update BulkChangeDemo set isEducated =true;
Rows matched: 6 Changed: 4 Warnings: 0

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批量更改MySQL中特定字段的所有条目？

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