Question

I have 2 tables such as below:

Table 1 contain UserID and Name while table 2 contain UserID, Skill_ID, and SkillName

What I want to do is, I want to search someone who has 2 skill, searched via SkillName.

example: I have Andy as Name where he have 2 skill PHP and C# so when i Search PHP & C#, Andy will be shown as result.

Can anybody help me? Thank you.

Answer 1

SELECT a.Name
FROM    table1 a
        INNER JOIN table2 b
            ON a.userID = b.user_ID
WHERE   b.skill_name IN ('PHP','C#')
GROUP   BY a.Name
HAVING  COUNT(*) = 2

the design of your table is not well normalized. The type of relationship is Many-to-Many and in this case, this should be three tables, Users, Skills and the linking table User_Skills.

A suggested design would be:

Table User

• UserID (PK)
• Name

Table Skills

• SkillID (PK)
• SkillName

Table User_Skills

• UserID (FK)
• SkillID (FK)