Number of cardiology wards
The chief physician needs a quick summary: how many cardiology wards the hospital has. The codes of these wards start with the CARD prefix. Count the number of distinct wards with this prefix and name the result column wards_count.
Expected output sample
This is what a correct answer looks like — its row count is its own, it doesn't have to match the schema tables.
| wards_count |
|---|
| 3 |
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Paused · SomaFM · Fluid