The snippet library.
Small, practical examples. Search by task or narrow things down below.
Enable and use foreign keys
Turn on relationship enforcement for the connection.
foreign keys✓ Tested
Enforce a bounded numeric range
SQLite: A named CHECK constraint keeps numeric values inside an inclusive interval.
SQLite✓ Tested
Enforce a relationship between two columns
SQLite: A row-level CHECK can require a start value to be no greater than an end value.
SQLite✓ Tested
Enforce uniqueness with a dedicated index
SQLite: A unique index rejects a duplicate combination independently of query plans.
SQLite✓ Tested
Expand a JSON array into rows
Iterate array elements using a table-valued function.
json_each✓ Tested
Expose a reusable filtered view
SQLite: A view stores a query definition rather than a snapshot of its rows.
SQLite✓ Tested
Extract a JSON field
Read a scalar value from JSON text.
json_extract✓ Tested
Extract part of a string
Use one-based positions with substr.
substr✓ Tested
Filter by a numeric comparison
SQLite: Keep rows whose quantity exceeds a chosen threshold.
SQLite✓ Tested
Filter groups after aggregation
SQLite: Use HAVING to test a group’s calculated total.
SQLite✓ Tested
Filter rows before grouping
SQLite: WHERE limits the rows contributing to the aggregate; it differs from filtering completed groups with HAVING.
SQLite✓ Tested
Find missing values with IS NULL
SQLite: Use IS NULL rather than equality to test for missing data.
SQLite✓ Tested