Querydrill

Level 5: Interview classics Exercise 53 of 60 Pro

Pivot the statuses

An SQL exercise from Querydrill. Solve it with a SQL editor in your browser, checked on the rows it returns and again on changed data, and it is checked the moment you submit.

The task

Return one row with three columns: the number of paid orders, refunded orders and pending orders, in that order.

What this exercise teaches

Conditional aggregation turns rows into columns without a PIVOT keyword.

A hint if you get stuck

SUM(CASE WHEN ... THEN 1 ELSE 0 END) once per status.

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