people表:
person表:
SELECT * FROM person
LEFT JOIN people on people.id=person.id
查询的结果id(1)和name(1)说明列名重复
SELECT person.id,person.name,people.id as pid,people.name as pname FROM person
LEFT JOIN people on people.id=person.id
重复的列名起一个别名
people表:
person表:
SELECT * FROM person
LEFT JOIN people on people.id=person.id
查询的结果id(1)和name(1)说明列名重复
SELECT person.id,person.name,people.id as pid,people.name as pname FROM person
LEFT JOIN people on people.id=person.id
重复的列名起一个别名
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