SQL：如何从 2 个表中选择所有记录

Question

I'm trying with SQL query to select all the projects from 1 table and from table 2 all the emails. The final result should:

project_name student_email         
project 1    email 1 

This for all the records I have. The 2 tables look like:

Student table:

Projects table:

What I would like to know is the query to select all the project and specify also the emails associated from students table

Answer 1

The query should be:

Select pro.project_name, st.student_mail from student st join projects pro on (st.student_id=pro.student_id)

You can add a where at the end.

pro. and st. -> These 2 are Aliases, just so i don´t have to type Table´s full name.

If you want to receive data from 2 or more tables, u should use Joins.

For more information about "joins":

- https://www.w3schools.com/sql/sql_join.asp