Results for “exec”
Small, practical examples. Search by task or narrow things down below.
Attach an overall count to every row
SQL: An uncorrelated scalar subquery supplies the same aggregate to each output row.
SQL✓ Tested
Block deletion of a referenced parent
SQL: The default foreign-key action prevents deletion while a child still refers to the parent.
SQL✓ Tested
Block scripts in an embedded document
HTML: An empty sandbox attribute applies the default set of restrictions, including blocking script execution.
HTML✓ Tested
Build a query from several named stages
SQL: Separate row selection from aggregation using two common table expressions.
SQL✓ Tested
Calculate a cumulative integer percentage
SQL: Divide a running window sum by the complete total using a unique ordering key.
SQL✓ Tested
Calculate a total for each group
SQL: Group nonmissing categories and calculate separate totals.
SQL✓ Tested
Calculate a value with SELECT
SQL: Evaluate a small arithmetic expression on the database server.
SQL✓ Tested
Calculate each group’s integer percentage of the total
SQL: Multiply before division and protect against a zero denominator.
SQL✓ Tested
Calculate each group’s numeric spread
SQL: Subtract MIN from MAX to report the difference between extremes.
SQL✓ Tested
Check whether a function has been defined
Bash Scripts: declare -F tests a function name without executing it.
Bash Scripts✓ Tested
Choose among several numeric ranges
Bash Scripts: An if-elif chain evaluates branches in order and executes the first match.
Bash Scripts✓ Tested
Combine a stable entrypoint with default arguments
Docker / Compose: CMD supplies default arguments to an exec-form ENTRYPOINT.
Docker / Compose✓ Tested