SQL从一个表中选择项目，从另一个表中选择条件

Question

I have 2 Tables:

Accounts(ID, Name, Adress, Type)

Holidays(Name, StartDate, EndDate)

And the Type column from Accounts is a SET("Manager","Director","Administrator") for example.

The Name Column for both colums are relationed. When someone creates a holiday, the Name from table Holidays will be his name from the account that is logged in.

And i want to know if it's possible to make a SQL statement where i can take all of table 2 which the the table1.type need to be "Director" and the Table1.name needs to be on holidays.

Answer 1

SELECT * FROM Accounts as a, Holidays as h WHERE a.Name = h.Name AND a.Type = 'Director' 

This should get you all the entries you want. It's important to link a.Name to h.Name to ensure that you get the right combination.

Answer 2

I think this will make the trick. You don't need to check for the name in Holidays because when we are making the left join we say take the records where the name is equal on both tables. If it is not in holidays you are not going to get any records.

select Accounts.ID,Accounts.Name,Accounts.Adress,Accounts.Type,Holidays.Name,Holidays.StartDate,Holidays.EndDate from Accounts left join Holidays on Accounts.Name=Holidays.Name where Accounts.Type = "Director";