如何编写 SQL 查询以从多个表中获取数据？

Question

I need next data from different tables in one report

I need to choose all consultants info from consultant.table

first_name & last_name & email & phone from passport.table

I have passport_id in users table

Number of consultant and his level from main table of query consultant.table

Answer 1

Use this sql query to get your result:

  SELECT  a.first_name, 
      a.last_name, 
      a.email, 
      a.phone, 
      b.level,
      b.user_id
      from passport a 
      INNER JOIN user c 
      ON a.id=c.passport_id
      INNER JOIN consultant b 
      ON b.user_id=c.id

Check this SQL Fiddle for output

Answer 2

Try to do an inner or left join. Something like this:

SELECT a.first_name, a.last_name, a.email, a.phone, b.* from passport a
LEFT JOIN user b
ON a.id=b.passport_id

I can't see from your screenshot what the field names are for Consultant and Level hence the b.* to pickup all the fields from that table (I assume it IS on that table?). Anyway you can customize this query easily.