+--------+--------------------+
| Xtr | Codigo_FLGHT |
+--------+--------------------+
| RAS_SD | Zone FlightCA |
| RAS_SD | Zone FlightN |
| RAS_SD | Zone FlightOR |
| RAS_SD | Zone FlightS |
| RAS_SD | Zone FlightO |
| RAS_SD | Xtr_SAR |
+--------+--------------------+
But I have in column Codigo_FLGHT ALL null values.
Can you help me?
Please check my query below.
Thanks in advance.
SELECT
Xtr,
CASE
WHEN INSTR(Codigo_FLGHT, 'Zone' > 0) THEN
Codigo_FLGHT = MID(Codigo_FLGHT, 6, 100)
WHEN INSTR(Codigo_FLGHT, 'Xtr' > 0) THEN
Codigo_FLGHT = Codigo_FLGHT
END Codigo_FLGHT
FROM
tbl_myflight
WHERE
1
AND INSTR(Codigo_FLGHT, 'Zone')
AND (Xtr LIKE 'RAS_SD%')
GROUP BY
Codigo_FLGHT;
CASE
WHEN INSTR(Codigo_FLGHT, 'Zone' > 0) THEN
Codigo_FLGHT = MID(Codigo_FLGHT, 6, 100)
WHEN INSTR(Codigo_FLGHT, 'Xtr' > 0) THEN
Codigo_FLGHT = Codigo_FLGHT
END Codigo_FLGHT
to this (which also contains your syntax corrections) –
CASE WHEN INSTR(Codigo_FLGHT, 'Zone' > 0)
THEN MID(Codigo_FLGHT, 6, 100)
WHEN INSTR(Codigo_FLGHT, 'Xtr' > 0)
THEN Codigo_FLGHT
END AS Codigo_FLGHT
the THEN and ELSE portions of the CASE expression must specify values, whereas you were specifying true or false results of an equality comparison
be aware that if you do not specify an ELSE value, then NULL is the result if all the WHEN tests fail
and you said that all your results are showing NULLs, so that means both of your WHEN tests are failing
ask yourself what might be causing INSTR(Codigo_FLGHT, ‘Zone’ > 0) and INSTR(Codigo_FLGHT, ‘Xtr’ > 0) to fail
if you can’t see it, you’ll need to look up the syntax of the INSTR() function and examine it very carefully
SELECT
Xtr,
CASE
WHEN INSTR(Codigo_FLGHT, 'Zone') > 0 THEN
MID(Codigo_FLGHT, 6, 100)
WHEN INSTR(Codigo_FLGHT, 'Xtr') > 0 THEN
Codigo_FLGHT
END AS Codigo_FLGHT
FROM
tbl_myflight
WHERE
1
AND (
INSTR(Codigo_FLGHT, 'Zone')
OR INSTR(Codigo_FLGHT, 'Xtr')
)
AND (Xtr LIKE 'RAS_SD%')
GROUP BY
Codigo_FLGHT;
+--------+--------------------+
| Xtr | Codigo_FLGHT |
+--------+--------------------+
| RAS_SD | Zone FlightCA |
| RAS_SD | Zone FlightN |
| RAS_SD | Zone FlightOR |
| RAS_SD | Zone FlightS |
| RAS_SD | Zone FlightO |
| RAS_SD | Xtr_SAR |
+--------+--------------------+