CASE _expression_
WHEN value THEN result
[WHEN ...]
[ELSE result]
ENDTry that where _expression_ is the %s. The values and results are simple literals. And you compare the result of the _expression_ to "name".
Or just do the rename in python, not sql.
David J.
On Monday, May 14, 2018, tango ward <tangoward15@xxxxxxxxx> wrote:
Noted Sir Adrian. The course name for the ones that are blank are not match with the ones in the profile_program table. I am writing a CASE Statement right now to verify the data but I can't make it work.:
for row in cur_t:
course = row['course']
cur_p.execute("""
SELECT id
FROM education_program
WHERE name=%s,
CASE
WHEN name='SENIOR HIGH SCHOOL GAS'
THEN name='General Academic Strand'
WHEN name='SENIOR HIGH SCHOOL HUMSS'
THEN name='Humanities and Social Sciences'
WHEN name='SENIOR HIGH SCHOOL STEM'
THEN name='Science, Technology, Engineering and Mathematics'
END
AND department_id
IN (SELECT id
FROM profile_department
WHERE school_id=1)
""", [course])
x = cur_p.fetchone()
print row['firstname'], row['lastname'], course, xOn Tue, May 15, 2018 at 12:12 PM, Adrian Klaver <adrian.klaver@xxxxxxxxxxx> wrote:On 05/14/2018 08:30 PM, tango ward wrote:
for row in cur_t:
course = row['course']
cur_p.execute("""
SELECT id
FROM education_program
WHERE name=%s
AND department_id
IN (SELECT id FROM profile_department WHERE school_id=1)
""", (course,))
x = cur_p.fetchall()
print x
So far I can see the program IDs but I am still getting empty list. Also
That would seem to indicate that the value of course is not matching any value in the field name for the given school_id. Maybe do:
print(course)
to see if they are valid values.
the program_id seems to be in a nested list. Why is that?
Because you are doing fetchall(). That is going to fetch a list of row tuples. Either iterate over that list or iterate over the cursor:
for row in cur_p:
print(row)
For more info see:
http://initd.org/psycopg/docs/cursor.html
<mailto:melvin6925@xxxxxxxxx>> wrote:
On Tue, May 15, 2018 at 10:47 AM, tango ward <tangoward15@xxxxxxxxx <mailto:tangoward15@xxxxxxxxx>> wrote:
Hi,
Yes sorry, here's the tables:
[cur_t DB] [student_profile table]
Column | Type | Collation |
Nullable | Default |
----------------------+------------------------+-----------+ ----------+------------------- ----+
studentnumber | character varying(45) | | not
null | ''::character varying |
firstname | character varying(60) | | | |
middlename | character varying(60) | | | |
lastname | character varying(60) | | | |
course | character varying(150) | | not
null | ''::character varying |
[cur_p DB] [profile table]
Column | Type | Collation |
Nullable | Default |
----------------------+------------------------+-----------+ ----------+------------------- ----+
studentnumber | character varying(45) | | not
null | ''::character varying |
firstname | character varying(60) | | | |
middlename | character varying(60) | | | |
lastname | character varying(60) | | | |
program_id | integer | | not
null | |
department_id | integer | | not
null | |
campus_id | integer | | not
null | |
So I am migrating the data from one database to another. Here, I am
moving data of student from student_profile table to profile table.
I have already migrated the course data to another table. What I
would like to do is get the value of program_id and department_id
for the profile table. I want to check if the course exist in
profile_program table, then get it's ID. I think I can use the same
logic for getting and setting value for the department_id column of
profile table. I am using psycopg2 to access and move the data.
for row in cur_t:
course = row['course']
# Here I would like to get the value of program_id and
department_id and insert it to the said columns but I don't know how
to do it yet
# I put ?? in department_id coz I don't know how to
access the 3 department IDs in this query.
cur_p.execute(""" SELECT id from st_profile where
name='$[course]' and department_id=?? """)
x = cur_p.fetchall()
# This will print an error since I added department_id
without value yet but if I remove it, I will get "None"
print x
Sorry for asking questions a lot, we don't have DBA at the moment.
Thanks,
J
On Tue, May 15, 2018 at 9:57 AM, melvin6925 <melvin6925@xxxxxxxxx
Perhaps if you care to provide us with the structure of all
tables involved, we could suggest a reasonable query.
Sent via the Samsung Galaxy S® 6, an AT&T 4G LTE smartphone
-------- Original message --------
From: tango ward <tangoward15@xxxxxxxxx
<mailto:tangoward15@xxxxxxxxx>>
Date: 5/14/18 21:08 (GMT-05:00)
To: "pgsql-generallists.postgresql.org <http://pgsql-generallists.postgresql.org >"
<pgsql-general@lists.postgresql.org
<mailto:pgsql-general@xxxxxxxxstgresql.org >>
Subject: Query ID Values
Good Day,
I need to run an SQL query and get a program_id and
department_id of a specific course for each student. I am
thinking of running an IF condition to check if the course name
is in program and get it's ID but I don't know yet where to use
the IF condition in the query.
sample code:
for row in cur_t:
course = row['course']
cur_p.execute("""SELECT id from program where
name='$[course]']
WHERE department_id=?? """)
Problem is I have 3 department IDs ( Senior High, Vocational,
Undergraduate ) and each ID have multiple programs/courses. Each
program/course is connected to the deparment table via
department_id.
May I ask an advice on how to approach this?
Thanks,
J
--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx
