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Results for “relationship”

Small, practical examples. Search by task or narrow things down below.

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SQLSchema design & transactions

Enforce a relationship between two columns

SQL: A row-level CHECK can require a start value to be no greater than an end value.

SQL✓ Tested
SQL ServerSchema design & transactions

Enforce a relationship between two columns

SQL Server: A row-level CHECK can require a start value to be no greater than an end value.

SQL Server✓ Tested
PostgresSchema design & transactions

Enforce a relationship between two columns

Postgres: A row-level CHECK can require a start value to be no greater than an end value.

Postgres✓ Tested
SQLiteSchema design & transactions

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
SQLRelationships & missing data

Include zero counts for missing relationships

SQL: Count the non-null child key after a left join so a missing relationship produces zero.

SQL✓ Tested
SQL ServerRelationships & missing data

Include zero counts for missing relationships

SQL Server: Count the non-null child key after a left join so a missing relationship produces zero.

SQL Server✓ Tested
PostgresRelationships & missing data

Include zero counts for missing relationships

Postgres: Count the non-null child key after a left join so a missing relationship produces zero.

Postgres✓ Tested
SQLiteRelationships & missing data

Include zero counts for missing relationships

SQLite: Count the non-null child key after a left join so a missing relationship produces zero.

SQLite✓ Tested
SQLConstraints & defaults

Keep children while clearing a deleted relationship

SQL: ON DELETE SET NULL requires a nullable foreign-key column.

SQL✓ Tested
SQL ServerConstraints & defaults

Keep children while clearing a deleted relationship

SQL Server: ON DELETE SET NULL requires a nullable foreign-key column.

SQL Server✓ Tested
PostgresConstraints & defaults

Keep children while clearing a deleted relationship

Postgres: ON DELETE SET NULL requires a nullable foreign-key column.

Postgres✓ Tested
SQLiteConstraints & defaults

Keep children while clearing a deleted relationship

SQLite: ON DELETE SET NULL requires a nullable foreign-key column.

SQLite✓ Tested