今日题目(数据库系列)
175. 组合两个表
解题思路:
>本题目是将两张表进行连接 >发现两张表有共有字段PersonId >所以可以用左连接进行连接 >A left join B
MySQL:
select Person.FirstName,Person.LastName,Address.City,Address.State from Person left join Address on Person.PersonId=Address.PersonId
解题思路:
>本题目是将两张表进行连接 >发现两张表有共有字段PersonId >所以可以用左连接进行连接 >A left join B
MySQL:
select Person.FirstName,Person.LastName,Address.City,Address.State from Person left join Address on Person.PersonId=Address.PersonId