54 lines
1.7 KiB
SQL
54 lines
1.7 KiB
SQL
-- 会员编号字段迁移脚本
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-- 执行日期: 2025-09-26
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-- 描述: 为用户表添加会员编号字段，按照创建时间从1开始递增编号
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-- Step 1: 添加会员编号字段
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ALTER TABLE `t_users`
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ADD COLUMN `member_number` INT NULL COMMENT '会员编号（按注册时间递增）' AFTER `gender`;
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-- Step 2: 创建索引以提高查询性能
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CREATE INDEX `idx_member_number` ON `t_users` (`member_number`);
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-- Step 3: 为现有用户按照创建时间分配会员编号（从1开始递增）
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SET @row_number = 0;
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UPDATE `t_users`
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SET `member_number` = (@row_number := @row_number + 1)
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WHERE `member_number` IS NULL
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ORDER BY `created_at` ASC;
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-- Step 4: 验证更新结果
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SELECT
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COUNT(*) as total_users,
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MIN(member_number) as min_member_number,
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MAX(member_number) as max_member_number,
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COUNT(DISTINCT member_number) as unique_member_numbers
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FROM `t_users`
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WHERE `member_number` IS NOT NULL;
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-- Step 5: 显示前10个用户的会员编号分配情况
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SELECT
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`id`,
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`name`,
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`member_number`,
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`created_at`,
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`is_guest`
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FROM `t_users`
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WHERE `member_number` IS NOT NULL
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ORDER BY `member_number` ASC
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LIMIT 10;
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-- Step 6: 检查是否有重复的会员编号（应该为0）
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SELECT
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member_number,
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COUNT(*) as count
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FROM `t_users`
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WHERE `member_number` IS NOT NULL
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GROUP BY `member_number`
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HAVING COUNT(*) > 1;
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-- 注意事项:
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-- 1. 此脚本会为所有现有用户分配会员编号，按照创建时间排序
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-- 2. 会员编号从1开始递增
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-- 3. 包含游客用户也会分配编号
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-- 4. 如果只希望为正式用户（非游客）分配编号，请在更新语句中添加条件: WHERE `member_number` IS NULL AND `is_guest` = 0
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-- 5. 执行前请备份数据库 |