39 lines
1.6 KiB
MySQL
39 lines
1.6 KiB
MySQL
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-- ----------------------------
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-- 为薪资表和社保表添加唯一约束
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-- 约束规则：员工ID + 年月 + 删除标志
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-- 防止同一员工在同一月份有多条记录
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-- ----------------------------
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-- ----------------------------
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-- 1. 工资表 biz_salary 添加唯一约束
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-- ----------------------------
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-- 先删除可能存在的旧约束
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ALTER TABLE biz_salary DROP INDEX IF EXISTS uk_employee_salary_month;
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ALTER TABLE biz_salary DROP INDEX IF EXISTS uk_employee_salary_month_del;
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-- 添加唯一约束：员工ID + 工资月份 + 删除标志
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ALTER TABLE biz_salary
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ADD UNIQUE KEY uk_employee_salary_month_del (employee_id, salary_month, del_flag)
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COMMENT '同一员工同一月份只能有一条有效记录';
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-- ----------------------------
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-- 2. 社保表 biz_social_security 添加唯一约束
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-- ----------------------------
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-- 先删除可能存在的旧约束
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ALTER TABLE biz_social_security DROP INDEX IF EXISTS uk_employee_belong_month;
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ALTER TABLE biz_social_security DROP INDEX IF EXISTS uk_employee_belong_month_del;
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-- 添加唯一约束：员工ID + 所属月份 + 删除标志
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ALTER TABLE biz_social_security
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ADD UNIQUE KEY uk_employee_belong_month_del (employee_id, belong_month, del_flag)
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COMMENT '同一员工同一月份只能有一条有效记录';
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-- ----------------------------
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-- 查询验证
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-- ----------------------------
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-- 查看工资表的唯一约束
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SHOW INDEX FROM biz_salary WHERE Key_name = 'uk_employee_salary_month_del';
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-- 查看社保表的唯一约束
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SHOW INDEX FROM biz_social_security WHERE Key_name = 'uk_employee_belong_month_del';
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