Results for “Lifecycle & observable data”
Small, practical examples. Search by task or narrow things down below.
Commit multiple related changes together
SQLite: The first transaction prepares the fixtures. The second commits both updates as one unit.
SQLite✓ Tested
Compare a row with its own group average
SQL: A correlated aggregate computes a different comparison value for each group.
SQL✓ Tested
Compare a row with its own group average
SQL Server: A correlated aggregate computes a different comparison value for each group.
SQL Server✓ Tested
Compare a row with its own group average
Postgres: A correlated aggregate computes a different comparison value for each group.
Postgres✓ Tested
Compare a row with its own group average
SQLite: A correlated aggregate computes a different comparison value for each group.
SQLite✓ Tested
Compare a row with the previous row
Read a preceding value with LAG.
LAG✓ Tested
Compare with a calculated value
Find products above the average price.
subquery✓ Tested
Compute an integer weighted average
SQL: Multiply before summing and guard a zero total weight with NULLIF.
SQL✓ Tested
Compute an integer weighted average
SQL Server: Multiply before summing and guard a zero total weight with NULLIF.
SQL Server✓ Tested
Compute an integer weighted average
Postgres: Multiply before summing and guard a zero total weight with NULLIF.
Postgres✓ Tested
Compute an integer weighted average
SQLite: Multiply before summing and guard a zero total weight with NULLIF.
SQLite✓ Tested
Convert text without raising a conversion error
Return NULL when a numeric conversion fails.
TRY_CONVERT✓ Tested