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example subquery within a subquery for 'More Join' #1

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example subquery within a subquery for 'More Join' #1

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13 changes: 13 additions & 0 deletions SQLZOO_solutions.md
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Original file line number Diff line number Diff line change
Expand Up @@ -504,6 +504,19 @@ WHERE ord = 1
JOIN actor ON actor.id = actorid
WHERE actor.name = 'Julie Andrews')
```
13.b (using a subquery)
```sql
SELECT movie.title, actor.name FROM movie
JOIN casting ON casting.movieid = movie.id
JOIN actor ON casting.actorid = actor.id
WHERE casting.ord = 1
AND casting.movieid IN (
SELECT distinct movieid FROM casting
WHERE actorid =
(SELECT id FROM actor
WHERE name = 'Julie Andrews')
)
```
14.
```sql
SELECT DISTINCT name FROM casting
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