java - Mysql多条件批量查询

Question

请教一个问题：mysql中，我查询语句
select * from tableA where name='test' and age='18';
然后我有一个name和age的list列表，分别通过这两个条件去查询，有什么比较方法可以查询；

eg：
select * from tableA where name='test' and age='18';
select * from tableA where name='test1' and age='18';
select * from tableA where name='test2' and age='20';
select * from tableA where name='test2' and age='56';
···

其中查出来的数据对应Java的一个实体。其中List表的大小为500-3000，数据表的记录为每天8万左右

Answer 1

Create a view query, which will be more efficient. At least slightly faster than temporary tables

Answer 2

table A adds a column named nameage. The value in it is the combination of name and age. For example, test18
select * from tableA where nameage in ('test18','xxxxxx','xxxxxxx')

Of course you don’t need to add columns, you can also write it in SQL yourself

Answer 3

togeek’s answer is very cool
You may want to consider the efficiency of sql again

Answer 4

select a.* 
from tableA a
inner join list l on l.name=a.name and l.age=a.age

No way?

Answer 5

When the amount of data is not large, you can do this.

SELECT * FROM tableA
WHERE (name, age) IN (
('test', 18),
('test1', 18),
('test2', 20),
('test2', 56))

But by explaining the above query, you will find that this way of writing cannot use the index, so the query efficiency is very low.

Answer 6

select * from tableA where (name='test'and age='18')
or (name='test1'and age='18')
or (name='test2'and age='20')
...

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Create a temporary table and join 2 fields in the temporary table

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