The snippet library.
Small, practical examples. Search by task or narrow things down below.
Count distinct values within a result
SQLite: COUNT DISTINCT counts distinct non-null values.
SQLite✓ Tested
Count rows satisfying separate conditions
SQLite: SUM over CASE expressions calculates several conditional counts in one scan.
SQLite✓ Tested
Count the rows in a table
SQLite: COUNT(*) includes every row, including rows with NULL columns.
SQLite✓ Tested
Create a STRICT table
Require values compatible with declared column types.
STRICT✓ Tested
Create a table and insert its first row
SQLite: Define column types and a primary key, then insert one row using an explicit column list.
SQLite✓ Tested
Create an index for an equality filter
SQLite: A nonunique index can support lookups on a frequently filtered column.
SQLite✓ Tested
Create an index matching filter and ordering columns
SQLite: Place the equality-filter column before the ordering column in this composite index.
SQLite✓ Tested
Delete one row from a practice table
SQLite: Restrict DELETE with a primary-key condition and verify the remaining row count.
SQLite✓ Tested
Delete rows selected by a related table
SQLite: A correlated EXISTS limits the delete to explicitly listed records.
SQLite✓ Tested
Display a fallback for missing data
SQLite: Return a supplied label when a column contains NULL.
SQLite✓ Tested
Distinguish row count from non-null value count
SQLite: COUNT(*) includes every row while COUNT(column) skips NULL values.
SQLite✓ Tested
Divide an ordered result into numbered buckets
SQLite: NTILE distributes rows across buckets; include a unique tie-breaker for deterministic assignment.
SQLite✓ Tested