Autosave: 2024-11-07 08:09:40

This commit is contained in:
thomasabishop 2024-11-07 08:09:40 +00:00
parent cb616923a5
commit 219c56ce0c
772 changed files with 175 additions and 4 deletions

View file

@ -0,0 +1,85 @@
---
tags: [python, databases, SQL]
created: Thursday, November 07, 2024
---
# Using SQLite with Python
SQLite is part of the core library, you do not require a separate package
```py
import sqlite3
```
## Connect to database
Connect to an existing SQLite `.db` file or create a new database with the same
command:
```py
connection = sqlite3.connect("my_database.db")
```
## Disconnect from database
```python
connection.close()
```
## Querying
`connect` exposes a `cursor` entity. This is used for executing changes against
the database file.
### Example: creating a table
```python
CREATE_TAGS_TABLE = """
CREATE TABLE IF NOT EXISTS tags (
name TEXT PRIMARY KEY
)
"""
cursor = connection.cursor()
cursor.execute(CREATE_TAGS_TABLE)
cursor.commit()
# Confirm changes
cursor.execute("SELECT name from sqlite_master WHERE type='table'")
print(cursor.fetchall())
# (tags)
```
## Prepared statements and parameterised queries
### Parameterised queries
```py
username = "thomas"
password = "123"
cursor.execute("SELECT * FROM users WHERE username = ? AND password = ?",
(username, password))
```
Alternatively, pass the [tuple](Tuples_in_Python.md) directly:
```python
login_data = ("thomas", "123")
cursor.execute("SELECT * FROM users WHERE username = ? AND password = ?",
login_data)
```
### Prepared statements
> With prepared statements you have to use a dictionary not a dictionary or
> other data type
```python
user_data = {
"username": "thomas",
"email": "thomas@email.com"
}
```

View file

@ -13,12 +13,13 @@ computer science.
![not-by-ai-badge](static/not-by-ai-alternative--light.svg)
**Build ID:** 1b27e703-342c-4cda-a280-3c6903424ecd
**Build ID:** 558c0727-0f83-47d2-a06f-ebf6f98e8821
**Published:** Tue 05 Nov 2024 15:14:03
**Published:** Thu 07 Nov 2024 08:09:39
### Recent edits
- [[Using_SQLite_with_Python]]
- [[f6564af9_AOL_and_early_internet_enclosure]]
- [[241fe1a3_the_Web_versus_modem_BBSs]]
- [[Weaving_the_Web_Berners_Lee]]
@ -30,10 +31,9 @@ computer science.
- [[MongoDB_connection]]
- [[Commutative_Property_of_Addition_and_Multiplication]]
- [[Call_stack]]
- [[Typing_built_in_React_hooks]]
### All notes (486)
### All notes (487)
- [[241fe1a3_the_Web_versus_modem_BBSs]]
- [[385af4b4_Baran_distributed_networks]]
@ -475,6 +475,7 @@ computer science.
- [[User_management_in_Linux]]
- [[User_management_on_AWS]]
- [[Using_GraphQL_with_Node]]
- [[Using_SQLite_with_Python]]
- [[Using_arguments_with_Apollo_Client]]
- [[Utilities_operators_flags]]
- [[Validating_Mongoose_schemas]]

View file

Before

Width:  |  Height:  |  Size: 7.1 KiB

After

Width:  |  Height:  |  Size: 7.1 KiB

View file

Before

Width:  |  Height:  |  Size: 145 KiB

After

Width:  |  Height:  |  Size: 145 KiB

View file

Before

Width:  |  Height:  |  Size: 289 KiB

After

Width:  |  Height:  |  Size: 289 KiB

View file

Before

Width:  |  Height:  |  Size: 28 KiB

After

Width:  |  Height:  |  Size: 28 KiB

View file

Before

Width:  |  Height:  |  Size: 6.9 MiB

After

Width:  |  Height:  |  Size: 6.9 MiB

View file

Before

Width:  |  Height:  |  Size: 224 KiB

After

Width:  |  Height:  |  Size: 224 KiB

View file

Before

Width:  |  Height:  |  Size: 6.4 KiB

After

Width:  |  Height:  |  Size: 6.4 KiB

View file

Before

Width:  |  Height:  |  Size: 31 KiB

After

Width:  |  Height:  |  Size: 31 KiB

View file

Before

Width:  |  Height:  |  Size: 31 KiB

After

Width:  |  Height:  |  Size: 31 KiB

View file

Before

Width:  |  Height:  |  Size: 46 KiB

After

Width:  |  Height:  |  Size: 46 KiB

View file

Before

Width:  |  Height:  |  Size: 21 KiB

After

Width:  |  Height:  |  Size: 21 KiB

View file

Before

Width:  |  Height:  |  Size: 204 KiB

After

Width:  |  Height:  |  Size: 204 KiB

View file

Before

Width:  |  Height:  |  Size: 49 KiB

After

Width:  |  Height:  |  Size: 49 KiB

View file

Before

Width:  |  Height:  |  Size: 21 KiB

After

Width:  |  Height:  |  Size: 21 KiB

View file

Before

Width:  |  Height:  |  Size: 165 KiB

After

Width:  |  Height:  |  Size: 165 KiB

View file

Before

Width:  |  Height:  |  Size: 3.8 KiB

After

Width:  |  Height:  |  Size: 3.8 KiB

View file

Before

Width:  |  Height:  |  Size: 1.6 KiB

After

Width:  |  Height:  |  Size: 1.6 KiB

View file

Before

Width:  |  Height:  |  Size: 5.3 KiB

After

Width:  |  Height:  |  Size: 5.3 KiB

View file

Before

Width:  |  Height:  |  Size: 91 KiB

After

Width:  |  Height:  |  Size: 91 KiB

View file

Before

Width:  |  Height:  |  Size: 133 KiB

After

Width:  |  Height:  |  Size: 133 KiB

View file

Before

Width:  |  Height:  |  Size: 25 KiB

After

Width:  |  Height:  |  Size: 25 KiB

View file

Before

Width:  |  Height:  |  Size: 45 KiB

After

Width:  |  Height:  |  Size: 45 KiB

View file

Before

Width:  |  Height:  |  Size: 4 KiB

After

Width:  |  Height:  |  Size: 4 KiB

View file

Before

Width:  |  Height:  |  Size: 19 KiB

After

Width:  |  Height:  |  Size: 19 KiB

View file

Before

Width:  |  Height:  |  Size: 23 KiB

After

Width:  |  Height:  |  Size: 23 KiB

View file

Before

Width:  |  Height:  |  Size: 6.3 KiB

After

Width:  |  Height:  |  Size: 6.3 KiB

View file

Before

Width:  |  Height:  |  Size: 2 KiB

After

Width:  |  Height:  |  Size: 2 KiB

View file

Before

Width:  |  Height:  |  Size: 15 KiB

After

Width:  |  Height:  |  Size: 15 KiB

View file

Before

Width:  |  Height:  |  Size: 21 KiB

After

Width:  |  Height:  |  Size: 21 KiB

View file

Before

Width:  |  Height:  |  Size: 148 KiB

After

Width:  |  Height:  |  Size: 148 KiB

View file

Before

Width:  |  Height:  |  Size: 46 KiB

After

Width:  |  Height:  |  Size: 46 KiB

View file

Before

Width:  |  Height:  |  Size: 13 KiB

After

Width:  |  Height:  |  Size: 13 KiB

View file

Before

Width:  |  Height:  |  Size: 9.6 KiB

After

Width:  |  Height:  |  Size: 9.6 KiB

View file

Before

Width:  |  Height:  |  Size: 20 KiB

After

Width:  |  Height:  |  Size: 20 KiB

View file

Before

Width:  |  Height:  |  Size: 121 KiB

After

Width:  |  Height:  |  Size: 121 KiB

View file

Before

Width:  |  Height:  |  Size: 32 KiB

After

Width:  |  Height:  |  Size: 32 KiB

View file

Before

Width:  |  Height:  |  Size: 470 KiB

After

Width:  |  Height:  |  Size: 470 KiB

View file

Before

Width:  |  Height:  |  Size: 12 KiB

After

Width:  |  Height:  |  Size: 12 KiB

View file

Before

Width:  |  Height:  |  Size: 13 KiB

After

Width:  |  Height:  |  Size: 13 KiB

View file

Before

Width:  |  Height:  |  Size: 14 KiB

After

Width:  |  Height:  |  Size: 14 KiB

View file

Before

Width:  |  Height:  |  Size: 13 KiB

After

Width:  |  Height:  |  Size: 13 KiB

View file

Before

Width:  |  Height:  |  Size: 59 KiB

After

Width:  |  Height:  |  Size: 59 KiB

View file

Before

Width:  |  Height:  |  Size: 1.4 KiB

After

Width:  |  Height:  |  Size: 1.4 KiB

View file

Before

Width:  |  Height:  |  Size: 1.2 KiB

After

Width:  |  Height:  |  Size: 1.2 KiB

View file

Before

Width:  |  Height:  |  Size: 16 KiB

After

Width:  |  Height:  |  Size: 16 KiB

View file

Before

Width:  |  Height:  |  Size: 14 KiB

After

Width:  |  Height:  |  Size: 14 KiB

View file

Before

Width:  |  Height:  |  Size: 14 KiB

After

Width:  |  Height:  |  Size: 14 KiB

View file

Before

Width:  |  Height:  |  Size: 59 KiB

After

Width:  |  Height:  |  Size: 59 KiB

View file

Before

Width:  |  Height:  |  Size: 99 KiB

After

Width:  |  Height:  |  Size: 99 KiB

View file

Before

Width:  |  Height:  |  Size: 24 KiB

After

Width:  |  Height:  |  Size: 24 KiB

View file

Before

Width:  |  Height:  |  Size: 26 KiB

After

Width:  |  Height:  |  Size: 26 KiB

View file

Before

Width:  |  Height:  |  Size: 848 KiB

After

Width:  |  Height:  |  Size: 848 KiB

View file

Before

Width:  |  Height:  |  Size: 194 KiB

After

Width:  |  Height:  |  Size: 194 KiB

View file

Before

Width:  |  Height:  |  Size: 21 KiB

After

Width:  |  Height:  |  Size: 21 KiB

View file

Before

Width:  |  Height:  |  Size: 130 KiB

After

Width:  |  Height:  |  Size: 130 KiB

View file

Before

Width:  |  Height:  |  Size: 171 KiB

After

Width:  |  Height:  |  Size: 171 KiB

View file

Before

Width:  |  Height:  |  Size: 20 KiB

After

Width:  |  Height:  |  Size: 20 KiB

View file

Before

Width:  |  Height:  |  Size: 31 KiB

After

Width:  |  Height:  |  Size: 31 KiB

View file

Before

Width:  |  Height:  |  Size: 9.7 KiB

After

Width:  |  Height:  |  Size: 9.7 KiB

View file

Before

Width:  |  Height:  |  Size: 25 KiB

After

Width:  |  Height:  |  Size: 25 KiB

View file

Before

Width:  |  Height:  |  Size: 79 KiB

After

Width:  |  Height:  |  Size: 79 KiB

View file

Before

Width:  |  Height:  |  Size: 157 KiB

After

Width:  |  Height:  |  Size: 157 KiB

View file

Before

Width:  |  Height:  |  Size: 72 KiB

After

Width:  |  Height:  |  Size: 72 KiB

View file

Before

Width:  |  Height:  |  Size: 153 KiB

After

Width:  |  Height:  |  Size: 153 KiB

View file

Before

Width:  |  Height:  |  Size: 52 KiB

After

Width:  |  Height:  |  Size: 52 KiB

View file

Before

Width:  |  Height:  |  Size: 87 KiB

After

Width:  |  Height:  |  Size: 87 KiB

View file

Before

Width:  |  Height:  |  Size: 118 KiB

After

Width:  |  Height:  |  Size: 118 KiB

View file

Before

Width:  |  Height:  |  Size: 414 KiB

After

Width:  |  Height:  |  Size: 414 KiB

View file

Before

Width:  |  Height:  |  Size: 34 KiB

After

Width:  |  Height:  |  Size: 34 KiB

View file

Before

Width:  |  Height:  |  Size: 174 KiB

After

Width:  |  Height:  |  Size: 174 KiB

View file

Before

Width:  |  Height:  |  Size: 16 KiB

After

Width:  |  Height:  |  Size: 16 KiB

View file

Before

Width:  |  Height:  |  Size: 167 KiB

After

Width:  |  Height:  |  Size: 167 KiB

View file

Before

Width:  |  Height:  |  Size: 150 KiB

After

Width:  |  Height:  |  Size: 150 KiB

View file

Before

Width:  |  Height:  |  Size: 9.2 KiB

After

Width:  |  Height:  |  Size: 9.2 KiB

View file

Before

Width:  |  Height:  |  Size: 140 KiB

After

Width:  |  Height:  |  Size: 140 KiB

View file

Before

Width:  |  Height:  |  Size: 190 KiB

After

Width:  |  Height:  |  Size: 190 KiB

View file

Before

Width:  |  Height:  |  Size: 374 KiB

After

Width:  |  Height:  |  Size: 374 KiB

View file

Before

Width:  |  Height:  |  Size: 9 KiB

After

Width:  |  Height:  |  Size: 9 KiB

View file

Before

Width:  |  Height:  |  Size: 1.2 MiB

After

Width:  |  Height:  |  Size: 1.2 MiB

View file

Before

Width:  |  Height:  |  Size: 76 KiB

After

Width:  |  Height:  |  Size: 76 KiB

View file

Before

Width:  |  Height:  |  Size: 448 KiB

After

Width:  |  Height:  |  Size: 448 KiB

View file

Before

Width:  |  Height:  |  Size: 122 KiB

After

Width:  |  Height:  |  Size: 122 KiB

View file

Before

Width:  |  Height:  |  Size: 668 KiB

After

Width:  |  Height:  |  Size: 668 KiB

View file

Before

Width:  |  Height:  |  Size: 1.9 KiB

After

Width:  |  Height:  |  Size: 1.9 KiB

View file

Before

Width:  |  Height:  |  Size: 20 KiB

After

Width:  |  Height:  |  Size: 20 KiB

View file

Before

Width:  |  Height:  |  Size: 20 KiB

After

Width:  |  Height:  |  Size: 20 KiB

View file

Before

Width:  |  Height:  |  Size: 2.5 KiB

After

Width:  |  Height:  |  Size: 2.5 KiB

View file

Before

Width:  |  Height:  |  Size: 17 KiB

After

Width:  |  Height:  |  Size: 17 KiB

View file

Before

Width:  |  Height:  |  Size: 2.2 KiB

After

Width:  |  Height:  |  Size: 2.2 KiB

View file

Before

Width:  |  Height:  |  Size: 21 KiB

After

Width:  |  Height:  |  Size: 21 KiB

View file

Before

Width:  |  Height:  |  Size: 41 KiB

After

Width:  |  Height:  |  Size: 41 KiB

View file

Before

Width:  |  Height:  |  Size: 108 KiB

After

Width:  |  Height:  |  Size: 108 KiB

View file

Before

Width:  |  Height:  |  Size: 37 KiB

After

Width:  |  Height:  |  Size: 37 KiB

View file

Before

Width:  |  Height:  |  Size: 21 KiB

After

Width:  |  Height:  |  Size: 21 KiB

View file

Before

Width:  |  Height:  |  Size: 3.2 KiB

After

Width:  |  Height:  |  Size: 3.2 KiB

View file

Before

Width:  |  Height:  |  Size: 18 KiB

After

Width:  |  Height:  |  Size: 18 KiB

View file

Before

Width:  |  Height:  |  Size: 10 KiB

After

Width:  |  Height:  |  Size: 10 KiB

View file

Before

Width:  |  Height:  |  Size: 29 KiB

After

Width:  |  Height:  |  Size: 29 KiB

View file

Before

Width:  |  Height:  |  Size: 66 KiB

After

Width:  |  Height:  |  Size: 66 KiB

View file

Before

Width:  |  Height:  |  Size: 16 KiB

After

Width:  |  Height:  |  Size: 16 KiB

View file

Before

Width:  |  Height:  |  Size: 20 KiB

After

Width:  |  Height:  |  Size: 20 KiB

View file

Before

Width:  |  Height:  |  Size: 1.6 KiB

After

Width:  |  Height:  |  Size: 1.6 KiB

View file

Before

Width:  |  Height:  |  Size: 1.7 KiB

After

Width:  |  Height:  |  Size: 1.7 KiB

View file

Before

Width:  |  Height:  |  Size: 20 KiB

After

Width:  |  Height:  |  Size: 20 KiB

View file

Before

Width:  |  Height:  |  Size: 22 KiB

After

Width:  |  Height:  |  Size: 22 KiB

View file

Before

Width:  |  Height:  |  Size: 28 KiB

After

Width:  |  Height:  |  Size: 28 KiB

View file

Before

Width:  |  Height:  |  Size: 34 KiB

After

Width:  |  Height:  |  Size: 34 KiB

View file

Before

Width:  |  Height:  |  Size: 3.7 KiB

After

Width:  |  Height:  |  Size: 3.7 KiB

View file

Before

Width:  |  Height:  |  Size: 4.2 KiB

After

Width:  |  Height:  |  Size: 4.2 KiB

View file

Before

Width:  |  Height:  |  Size: 5.8 KiB

After

Width:  |  Height:  |  Size: 5.8 KiB

View file

Before

Width:  |  Height:  |  Size: 23 KiB

After

Width:  |  Height:  |  Size: 23 KiB

View file

Before

Width:  |  Height:  |  Size: 30 KiB

After

Width:  |  Height:  |  Size: 30 KiB

View file

Before

Width:  |  Height:  |  Size: 7.4 KiB

After

Width:  |  Height:  |  Size: 7.4 KiB

View file

Before

Width:  |  Height:  |  Size: 7.3 KiB

After

Width:  |  Height:  |  Size: 7.3 KiB

View file

Before

Width:  |  Height:  |  Size: 58 KiB

After

Width:  |  Height:  |  Size: 58 KiB

View file

Before

Width:  |  Height:  |  Size: 146 KiB

After

Width:  |  Height:  |  Size: 146 KiB

View file

Before

Width:  |  Height:  |  Size: 30 KiB

After

Width:  |  Height:  |  Size: 30 KiB

View file

Before

Width:  |  Height:  |  Size: 16 KiB

After

Width:  |  Height:  |  Size: 16 KiB

View file

Before

Width:  |  Height:  |  Size: 63 KiB

After

Width:  |  Height:  |  Size: 63 KiB

View file

Before

Width:  |  Height:  |  Size: 2.7 KiB

After

Width:  |  Height:  |  Size: 2.7 KiB

View file

Before

Width:  |  Height:  |  Size: 94 KiB

After

Width:  |  Height:  |  Size: 94 KiB

Binary file not shown.

View file

@ -0,0 +1,85 @@
---
tags: [python, databases, SQL]
created: Thursday, November 07, 2024
---
# Using SQLite with Python
SQLite is part of the core library, you do not require a separate package
```py
import sqlite3
```
## Connect to database
Connect to an existing SQLite `.db` file or create a new database with the same
command:
```py
connection = sqlite3.connect("my_database.db")
```
## Disconnect from database
```python
connection.close()
```
## Querying
`connect` exposes a `cursor` entity. This is used for executing changes against
the database file.
### Example: creating a table
```python
CREATE_TAGS_TABLE = """
CREATE TABLE IF NOT EXISTS tags (
name TEXT PRIMARY KEY
)
"""
cursor = connection.cursor()
cursor.execute(CREATE_TAGS_TABLE)
cursor.commit()
# Confirm changes
cursor.execute("SELECT name from sqlite_master WHERE type='table'")
print(cursor.fetchall())
# (tags)
```
## Prepared statements and parameterised queries
### Parameterised queries
```py
username = "thomas"
password = "123"
cursor.execute("SELECT * FROM users WHERE username = ? AND password = ?",
(username, password))
```
Alternatively, pass the [tuple](Tuples_in_Python.md) directly:
```python
login_data = ("thomas", "123")
cursor.execute("SELECT * FROM users WHERE username = ? AND password = ?",
login_data)
```
### Prepared statements
> With prepared statements you have to use a dictionary not a dictionary or
> other data type
```python
user_data = {
"username": "thomas",
"email": "thomas@email.com"
}
```