Join one table rows with another table columns in mysql - mysql

Question

I am new to mysql, Need to join two tables as below scenario
Table One : questions{question_id,question}
Example: question_id question
q01 communication skills
q02 reasoning skills
q03 technical skills
Table Two : grades{grade_id,grade}
Example : grade_id grade
gr01 below avg
gr02 avg
gr03 good
gr04 best
Want to join above two tables for below result
question_id question gr01 gr02 gr03 gr04
q01 communication skills below avg avg good best
q02 reasoning skills below avg avg good best
q03 technical skills below avg avg good best
Please help if it is possible.

Answer 1

You may want to have a look to same tutorial on database design. There are many good ones on the web. In the mean time, this may help you a little bit:
It seems you may need a table for 'persons' or similar such as:
TABLE persons
person_id int autoincrement primary key
person_name varchar(45)
--------
persons_attributes
Then you will have a questions table recording when the attributes of a person were taken
Table questions
question_id int autoincrement primary key
personid int
date_input date
communication_skills_id int
reasoning_skills_id int
technical_skills_id int
and you may need extra tables for: communication_skills; reasoning_skills; and technical_skill with a format as:
TABLE xxx_skills
xxx_skill_id int
grade varchar(30) #"below average", "average", "good","best"
Then you may join your tables as:
SELECT p.person_name, q.date_input, c.grade communication_skill, r.grade reasoning_skill, t.grade technical_skill
FROM questions q
INNER JOIN persons p
on q.person_id = p.person_id
INNER JOIN communication_skills c
ON q.communication_id = c.communication_id
INNER JOIN reasoning_skills r
ON q.reasoning_skills_id = reasoning_skills_id
INNER JOIN technical_skill t
ON q.technical_skills_id = t.technical_skills_id;