php - 如何从两个有条件的表中进行选择

Question

有两个表:

表1:

 id = 0      name=JOHN           speciality =dentist  
 id = 1      name=ABY            speciality= dentist  
 id = 2      name = SARA         speciality= cardiologist  

，...
表 2:

 id = 0    name = JOHN           city=paris
 id = 1    name = ABY            city=tokio
 id = 1    name = SARA           city=london

 $city='pa';  

 $speciality='dentist';

(这两个变量来自用户输入的搜索表单)

我想说的是:

select * FROM Table 1 WHERE speciality=$speciality AND city LIKE %$city% (from Table2) ;

我该说什么？ (很明显，两个表的每一行的id都是相同的，每个id代表一个人)

Answer 1

尝试这样:

   select t1.* FROM Table 1 as t1,table2 as t2 WHERE t1.speciality='$speciality' AND t1.city  LIKE %$city%  and t1.name=t2.name;

如果两个表的行 ID 相同，则:

   select t1.* FROM Table 1 as t1,table2 as t2 WHERE t1.speciality='$speciality' AND t1.city  LIKE %$city%  and t1.name=t2.name and t1.id=t2.id ;