python sqlite3 执行多个 select 查询

Question

I have a table called profil parent table of academic and projet and am tryin to loop through all profils and get their academic and projet

import pandas as pd
import sqlite3

conn = sqlite3.connect("Desktop/Dev/ScoutIT/src/db.sqlite3")
cur = conn.cursor()
candidats_id = cur.execute("select id from Candidat_profil ;")
for candidat_id in candidats_id: 
    academic= cur.execute('select * from Candidat_academic where profil_id = ?' , candidat_id)
    projet= cur.execute('select * from Candidat_projet_realise where profil_id = ?' , candidat_id)
    for row in academic:
        print(row)
    for row in projet:
        print(row)

the code above only print out projet but when i comment out projet i get academic printed.

Note: i have more child tables i want to implement in this code

Answer 1

try to chagne your code to the following:

import pandas as pd
import sqlite3    
conn = sqlite3.connect("Desktop/Dev/ScoutIT/src/db.sqlite3")
cur = conn.cursor()
candidats_id = cur.execute("select id from Candidat_profil ;")
for candidat_id in candidats_id: 
    cur.execute('select * from Candidat_academic where profil_id = ?' , candidat_id)
    academic=cur.fetchall()
    cur.execute('select * from Candidat_projet_realise where profil_id = ?' , candidat_id)
    projet= cur.fetchall()
    for row in academic:
        print(row)
    for row in projet:
        print(row)

I advice you to use cur.fetchone() or cur.fetchall() for the documentation, feel free to visit: a