从两个表中提取SQL数据

Question

I have a table called db.data and db.info . The db.data table has a name and dateadded column for every entry. The info table has a name and a status column for every name (status is either y or n ). I would like to pull the data from the db.data table for all the names added to that db by date but only if the status (the one in db.status) is n.

I have been looking around and found JOIN , but that seems to only work if the data is the same in both tables. Here, the names are the same, but I want the data extracted from db.data but only in the status for the 'name' cell (which is in both tables) is set to 'n'.

Answer 1

From what I understand, the data in each name column is the same for both tables. So a JOIN should work here:

SELECT db.data.*
FROM db.data
INNER JOIN db.info ON db.data.name = db.info.name
WHERE db.info.status = 'n'

Answer 2

You can use a join on name between the two tables

SELECT d.name, d.date
FROM db.data d
    JOIN db.info i ON d.name = i.name
WHERE i.status = 'N'
ORDER BY d.date

Answer 3

I think this is what you want:

select d.name, d.dateadded
  FROM db.info i, db.data d 
  WHERE i.name = d.name
    AND i.status = 'n';