i have an sql insert query that take values from user input and also insert the ID from another table as foreign key. for this is write the below query but it seems not working.
Status_type table
CREATE TABLE status_type (
ID int(5) NOT NULL,
status varchar(50) NOT NULL
);
info table
CREATE TABLE info (
ID int(11) NOT NULL,
name varchar(50), NULL
nickname varchar(50), NULL
mother_name varchar(50), NULL
birthdate date, NULL
status_type int <==this must be the foreign key for the status_type table
create_date date
);
for the user he has a dropdownlist that retrieve the value from the status_type table in order to select the value that he want to insert into the new record in the info table
where as the info table take int Type because i want to store the ID of the status_type and not the value
code:
query = '''
INSERT INTO info (ID,name,nickname,mother_name,birthdate,t1.status_type,created_date)
VALUES(?,?,?,?,?,?,?)
select t2.ID
from info as t1
INNER JOIN status_type as t2
ON t2.ID = t1.status_type
'''
args = (ID,name,nickname,mother_name,db,status_type,current_date)
cursor = con.cursor()
cursor.execute(query,args)
con.commit()
st.success('Record added Successfully')
the status_type field take an INT type (the ID of the value from another table ).
So when the user insert it insert the value.
What i need is to convert this value into its corresponding ID and store the ID
based on the answer of #Mostafa NZ I modified my query and it becomes like below :
query = '''
INSERT INTO info (ID,name,nickname,mother_name,birthdate,status_type,created_date)
VALUES(?,?,?,?,?,(select status_type.ID
from status_type
where status = ?),?)
'''
args = (ID,name,nickname,mother_name,db,status_type,current_date)
cursor = con.cursor()
cursor.execute(query,args)
con.commit()
st.success('Record added Successfully')
When creating a record, you can do one of these ways.
Receive as input from the user
Specify a default value for the field
INSERT INTO (...) VALUES (? ,? ,1 ,? ,?)
Use a select in the INSERT
INSERT INTO (...) VALUES (? ,? ,(SELECT TOP 1 ID FROM status_type ODER BY ID) ,? ,?)
When INSERT data, you can only enter the names of the destination table fields. t1.status_type is wrong in the following line
INSERT INTO info (ID,name,nickname,mother_name,birthdate,t1.status_type,created_date)
Related
I am trying to get my head around the 'On Duplicate Key' mysql statement. I have the following table:
id (primary key autoincr) / server id (INT) / member id (INT UNIQUE KEY) / basket (VARCHAR) / shop (VARCHAR UNIQUE KEY)
In this table each member can have two rows, one for each of the shops (shopA and shopB). I want to INSERT if there is no match for both the member id and shop. If there is a match I want it to update the basket to concat the current basket with additional information.
I am trying to use:
"INSERT INTO table_name (server_id, member_id, basket, shop) VALUES (%s, %s, %s, %s) ON DUPLICATE KEY UPDATE basket = CONCAT (basket,%s)"
Currently if there is an entry for the member for shopA when this runs with basket for shopB it adds the basket info to the shopA row instead of creating a new one.
Hope all this makes sense! Thanks in advance!
UPDATE: As requested here is the create table sql statement:
CREATE TABLE table_name ( member_id bigint(20) NOT NULL, server_id bigint(11) NOT NULL, basket varchar(10000) NOT NULL, shop varchar(30) NOT NULL, notes varchar(1000) DEFAULT NULL, PRIMARY KEY (member_id) ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4
In this table each member can have two rows, one for each of the shops
(shopA and shopB)
This means that member_id should not be the primary key of the table because it is not unique.
You need a composite primary key for the columns member_id and shop:
CREATE TABLE table_name (
member_id bigint(20) NOT NULL,
server_id bigint(11) NOT NULL,
basket varchar(10000) NOT NULL,
shop varchar(30) NOT NULL,
notes varchar(1000) DEFAULT NULL,
PRIMARY KEY (member_id, shop)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
See a simplified demo.
What I want to do is create 4 interconnected progressive category classes.I don't know if the method I did is correct. Unfortunately I have been reading the document for days. but I haven't made much progress
Over the 'company' class how can I query all data belonging to the 'DepartmentalUnit' class?
create_table_company= '''CREATE TABLE company(
ID SERIAL PRIMARY KEY ,
NAME VARCHAR NOT NULL ,
); '''
create_table_department = '''CREATE TABLE department (
ID SERIAL PRIMARY KEY ,
NAME VARCHAR NOT NULL ,
company_id BIGINT,
FOREIGN KEY(company_id) REFERENCES COMPANY(id)); '''
create_table_department_unit = '''CREATE TABLE department_unit(
ID SERIAL PRIMARY KEY ,
NAME VARCHAR NOT NULL ,
department_id BIGINT,
FOREIGN KEY(department_id) REFERENCES DEPARTMENT(id));
create_table_department_unit_categroy = '''CREATE TABLE department_unit_category(
ID SERIAL PRIMARY KEY ,
NAME VARCHAR NOT NULL ,
department_unit_id BIGINT,
FOREIGN KEY(department_unit_id) REFERENCES DEPARTMENT_UNİT(id));
Something like this:
SELECT
c.id, c.name, du.*
FROM
company AS c
JOIN
department AS d
ON
c.id = d.company_id
JOIN
department_unit AS du
ON
du.department_id = d.id
;
UPDATE
The above query works to get the department_unit information by connecting the tables by their common fields. In this case the company table finds the department information for each company by using the company_id field in department that links back to a company. Once the departments for a company are found the department units for each department is found by using the department_id field in department_unit to link back to the department table. The end result is a chain that connects a company to its department units.
I have a table of keywords that looks like this:
CREATE TABLE `keywords` (
`keyword` VarChar( 48 ) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
`id` Int( 11 ) AUTO_INCREMENT NOT NULL,
`blog_posts_fulltext_count` Int( 11 ) NOT NULL,
PRIMARY KEY ( `id` ) )
I also have a table of blog posts that looks like this:
CREATE TABLE `blog_posts` (
`id` Int( 11 ) AUTO_INCREMENT NOT NULL,
`title` LongText CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NULL,
`summary` LongText CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NULL,
PRIMARY KEY ( `id` ) );
CREATE FULLTEXT INDEX `title_summary_fulltext` ON `blog_posts`( `title`, `summary` );
As you can see, I have a full text index on the fields title, summary in blog_posts.
The following search works correctly:
select count(*) from blog_posts where match(title,summary) against ('paid');
Now I'd like to populate the field keywords.blog_posts_fulltext_count with the number of rows in blog_posts that the keyword appears in.
When I run this:
keywords = Keywords.objects.all()
for the_keyword in keywords:
query = "select count(id) from BlogPosts where match(title,summary) against ('{0}')".format(the_keyword.keyword)
number_of_mentions = blog_posts.objects.raw(query)
for obj in number_of_mentions:
a = obj
...the RawQuerySet number_of_mentions appears to return without errors, and number_of_mentions.query contains:
'select count(id) from blog_posts where match(title,summary) against ('paid')'
But when the code runs the for obj in number_of_mentions line, it throws:
raise InvalidQuery('Raw query must include the primary key')
I've also tried defining the query string as:
query = "select count('id') from BlogPosts where match(title,summary) against ('{0}')".format(the_keyword.keyword)
...and as:
query = "select count(*) from BlogPosts where match(title,summary) against ('{0}')".format(the_keyword.keyword)
...with the same error message resulting.
What is the correct way to get a result from a raw sql COUNT command in Django?
When you use blog_posts.objects.raw(), Django expects the raw query to somehow return blog_posts objects. But your count query will return a single number instead of a collection of objects. That's the API you see documented here.
If you want to run a query that will not return model objects, but something different (like a number), you have to use the method described in another section of that same page — Executing custom SQL directly.
The general idea is that you'll have to use a cursor (something that iterates over a database resultset) and get it's only result. The following example should give you an idea of how to do it.
from django.db import connection
with connection.cursor() as cursor:
cursor.execute("select count(id) from BlogPosts where match(title,summary) against (%s)", [the_keyword.keyword])
# get a single line from the result
row = cursor.fetchone()
# get the value in the first column of the result (the only column)
count_value = row[0]
I have two tables created from below query in SQLite:
CREATE TABLE people (
id integer unique primary key,
first_name text,
middle_name text,
last_name text,
email text,
phone text
);
CREATE TABLE companies (
id integer unique primary key,
name text,
url text,
contact integer,
FOREIGN KEY(contact) REFERENCES people(id)
);
I have all the data available in the first table, but I want to popup id in second table same as id in the first table.name in the companies table is concatenated string of first_name text,middle_name,last_name in people table.
I want something like "UPDATE companies SET contact = (SELECT people.id FROM people WHERE companies.name = people.first_name || "," || "people.second_name"; it will be great if I can show the string in people table is the subset of string in companies table
I am a beginner in python and SQlite both.
Extension from previous question
Attempting to insert SQL values into database after pulling from XML file, but none seem to be appearing in database after insert statement embedded in Python code. Without the SQL section included, the entries are printed as expected. I am not getting an error in my Python environment (Anaconda Navigator), so totally lost on how the queries were processed, but nothing was entered! I tried a basic select statement to display the table, but get an empty table back.
Select Query
%sql SELECT * FROM publication;
Main Python code
import sqlite3
con = sqlite3.connect("publications.db")
cur = con.cursor()
from xml.dom import minidom
xmldoc = minidom.parse("test.xml")
#loop through <pub> tags to find number of pubs to grab
root = xmldoc.getElementsByTagName("root")[0]
pubs = [a.firstChild.data for a in root.getElementsByTagName("pub")]
num_pubs = len(pubs)
count = 0
while(count < num_pubs):
#get data from each <pub> tag
temp_pub = root.getElementsByTagName("pub")[count]
temp_ID = temp_pub.getElementsByTagName("ID")[0].firstChild.data
temp_title = temp_pub.getElementsByTagName("title")[0].firstChild.data
temp_year = temp_pub.getElementsByTagName("year")[0].firstChild.data
temp_booktitle = temp_pub.getElementsByTagName("booktitle")[0].firstChild.data
temp_pages = temp_pub.getElementsByTagName("pages")[0].firstChild.data
temp_authors = temp_pub.getElementsByTagName("authors")[0]
temp_author_array = [a.firstChild.data for a in temp_authors.getElementsByTagName("author")]
num_authors = len(temp_author_array)
count = count + 1
#process results into sqlite
pub_params = (temp_ID, temp_title)
cur.execute("INSERT INTO publication (id, ptitle) VALUES (?, ?)", pub_params)
journal_params = (temp_booktitle, temp_pages, temp_year)
cur.execute("INSERT INTO journal (jtitle, pages, year) VALUES (?, ?, ?)", journal_params)
x = 0
while(x < num_authors):
cur.execute("INSERT OR IGNORE INTO authors (name) VALUES (?)", (temp_author_array[x],))
x = x + 1
#display results
print("\nEntry processed: ", count)
print("------------------\nPublication ID: ", temp_ID)
print("Publication Title: ", temp_title)
print("Year: ", temp_year)
print("Journal title: ", temp_booktitle)
print("Pages: ", temp_pages)
i = 0
print("Authors: ")
while(i < num_authors):
print("-",temp_author_array[i])
i = i + 1
print("\nNumber of entries processed: ", count)
SQL queries
%%sql
DROP TABLE IF EXISTS publication;
CREATE TABLE publication(
id INT PRIMARY KEY NOT NULL,
ptitle VARCHAR NOT NULL
);
/* Author Entity set and writes_for relationship */
DROP TABLE IF EXISTS authors;
CREATE TABLE authors(
name VARCHAR(200) PRIMARY KEY NOT NULL,
pub_id INT,
pub_title VARCHAR(200),
FOREIGN KEY(pub_id, pub_title) REFERENCES publication(id, ptitle)
);
/* Journal Entity set and apart_of relationship */
DROP TABLE IF EXISTS journal;
CREATE TABLE journal(
jtitle VARCHAR(200) PRIMARY KEY NOT NULL,
pages INT,
year INT(4),
pub_id INT,
pub_title VARCHAR(200),
FOREIGN KEY(pub_id, pub_title) REFERENCES publication(id, ptitle)
);
/* Wrote relationship b/w journal & authors */
DROP TABLE IF EXISTS wrote;
CREATE TABLE wrote(
name VARCHAR(100) NOT NULL,
jtitle VARCHAR(50) NOT NULL,
PRIMARY KEY(name, jtitle),
FOREIGN KEY(name) REFERENCES authors(name),
FOREIGN KEY(jtitle) REFERENCES journal(jtitle)
);
You need to call con.commit() in order to commit the data to the database. If you use the connection as a context manager (with con:), the connection will commit any changes you make (or roll them back if there is an error).
Explicitly closing the connection is also a good practice.
It looks like you are forgetting to commit and close the connection. You need to call these two functions in order to properly close the connection and to save the work you have done to the database.
conn.commit()
conn.close()