2026/10/5 -The ability to set or drop NOT NULL constraints from a column using the ALTER TABLE ALTER COLUMN syntax was added in SQLite 3.53.0 (2026-04-09). The "ALTER ...
2026/9/9 -Learn SQLite constraints with PRIMARY KEY, FOREIGN KEY, UNIQUE, CHECK, NOT NULL, DEFAULT, Python examples, edge cases, and DbSchema tooling.
5日前 -Steps to Create a Table. Use import sqlite3 to access SQLite functionality in Python. Use the connect() method to establish a connection to your SQLite database ...
2026/8/21 -A practical SQLite guide for Python: creating a database, inserting and reading data with sqlite3, avoiding SQL injection, and importing a real CSV file.
2026/10/9 -If a contentless table is configured with columnsize=0, attempting to insert a NULL value into the rowid is an SQLITE_MISMATCH error. ... INSERT INTO ft(ft) ...
6日前 -The general rule for all insert/update defaults is that they only take effect if no value for a particular column is passed as an execute() parameter; otherwise ...
2026/10/4 -The ifnull() function returns a copy of its first non-NULL argument, or NULL if both arguments are NULL. Ifnull() must have exactly 2 arguments. The ifnull() ...
2026/10/1 -To control an INSERT or UPDATE for data existing, you will want to add an ON CONFLICT clause to your statement. How do you update with join in ...
2026/9/22 -A list of common SQL commands with runnable examples: CREATE TABLE, INSERT, SELECT, UPDATE, DELETE, ALTER, DROP, JOIN, GROUP BY, BEGIN and COMMIT.
6日前 -It documents that Python str maps natively to SQLite TEXT and Python int to SQLite INTEGER, and that returned SQLite TEXT values become Python str by default.