[MySQL] SQL aliases the table

occasionally , When operating on tables in the database , It is found that the table name is rather lengthy , At this time, we need to create an alias for the table , The keyword of alias is as( Or you can skip it ) .

Now there is a student surface , The structure is as follows :

Now I think student Is too long. I don't want to fight all the time .

sql The statement is as follows

select a.Sno,a.Sname,a.Sage from student as a (as Can be removed )

give the result as follows :

We're right student Took an alias called a

Of course, we don't need to do this when we have a watch , But it is very useful for multiple tables and tables to connect with themselves

author ： Xiaoyao happy
source ：CSDN
original text ：https://blog.csdn.net/hxy19971101/article/details/53239979
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