Query To Select One Record From Multiple Records

Question

How can I write a query to get a table (the most right) in faster way if I want to select employers date "Dec-13" so the result look like this picture? Anybody help me?

Thank you !

Answer 1

use DISTINCT to unique select values from the column.

SELECT DISTINCT Employer_ID
FROM   TableName

Answer 2

Try with:

  SELECT ID, Employer_ID
    FROM table
GROUP BY Employer_ID

Answer 3

尝试

SELECT * FROM tablename GROUP BY Employer_ID