Results for “Relationships & missing data”
Small, practical examples. Search by task or narrow things down below.
Replace a literal substring
Postgres: REPLACE performs a literal replacement rather than a regular-expression substitution.
Postgres✓ Tested
Replace a literal substring
SQLite: REPLACE performs a literal replacement rather than a regular-expression substitution.
SQLite✓ Tested
Replace a nested JSONB value
Change one path with jsonb_set.
jsonb_set✓ Tested
Replace all matching text
Normalize repeated whitespace with a regular expression.
regexp_replace✓ Tested
Replace repeated whitespace
Normalize runs of whitespace to one space.
regex✓ Tested
Report duplicate business values and their frequency
SQL: Group by a candidate business key and retain only groups with multiple rows.
SQL✓ Tested
Report duplicate business values and their frequency
SQL Server: Group by a candidate business key and retain only groups with multiple rows.
SQL Server✓ Tested
Report duplicate business values and their frequency
Postgres: Group by a candidate business key and retain only groups with multiple rows.
Postgres✓ Tested
Report duplicate business values and their frequency
SQLite: Group by a candidate business key and retain only groups with multiple rows.
SQLite✓ Tested
Require a locally available image
Docker / Compose: The never pull policy fails for missing images instead of attempting a download.
Docker / Compose✓ Tested
Require a value with NOT NULL
SQL: Declare required fields at the database boundary, not only in application validation.
SQL✓ Tested
Require a value with NOT NULL
SQL Server: Declare required fields at the database boundary, not only in application validation.
SQL Server✓ Tested