当主表建立好后,查询得到结果:
当建立附表并且使用表关联时提示数据插入错误:
MySQL [banks]> insert into bank values("123456","123456","123.12",0,1),
-> ("111222","123456","124.13",0,2),-> ("111333","123456","1478.12",0,3),
-> ("222333","123456","1471.14",0,4),
-> ("101006","123456","1000000.12",1,5),
-> ("101004","123456","80000.32",0,6),
-> ("100100","123456","1000000.45",0,7);
给出的错误提示为:
ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint fails (`banks`.`bank`, CONSTRAINT `bank_ibfk_1` FOREIGN KEY (`cardnum`) REFERENCES `user` (`id`))
则可以新建了数据库并新增加两张表进行关联:
若能实现关联证明是索引数字超过主表最大数字,因此需要将数据逐一输入或者你知道主表有多少条记录,
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内心OS:貌似表关联数据只能逐一插入
这是因为我新建表名出现的错误,
以新数据库schools中的表插入数据为例:
目前问题尚多,还未解决,明天继续修改!!!!