Is there any wrong code with my query to join table?

Question

I am really confused with this codes. I have query like this

CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `aIPK` AS select 
`i         


        

Answer 1

I don't know what the exact problem(s) is, but your WHERE clause has a problem:

WHERE IPK IS NOT NULL

It is not allowed to refer to a column alias in the WHERE clause, because its value may not be determined yet. Instead, you should use this:

WHERE akdhis_kelanjutanstudi.IPK IS NOT NULL

Update:

The parentheses you used in your original view look strange, unnecessary, and possibly wrong. Try using the following:

CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost`
    SQL SECURITY DEFINER VIEW aIPK AS
SELECT t4.Kode AS Fakultas,
       t3.Kode AS Departemen,
       t1.NIM AS NIM,
       t1.TahunMasuk AS TahunMasuk,
       t6.IPK AS IPK
FROM akdmst_mahasiswamagister t1
LEFT JOIN akdmst_mayor t2
    ON t1.MayorID = t2.ID
LEFT JOIN ipbmst_departemen t3
    ON t2.DepartemenID = t3.ID
LEFT JOIN ipbmst_fakultason t4
    ON t3.FakultasID = t4.ID
LEFT JOIN ipbmst_orang t5
    ON t1.NIM = t5.NIMS2Key
LEFT JOIN akdhis_kelanjutanstudi t6
    ON t6.NIM = t5.NIMS2Key
WHERE t6.IPK IS NOT NULL
ORDER BY NIM
LIMIT 100;