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Fix typos in the SQL Roadmap (#5365)
Updated the row query definition. Row queries can return not just one but multiple rows.
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@@ -33,7 +33,7 @@ WHERE column_name OPERATOR
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WHERE roll_id = (SELECT roll_id FROM student WHERE name='John');
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WHERE roll_id = (SELECT roll_id FROM student WHERE name='John');
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```
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```
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2. **Row subquery**: It returns single row of two or more values.
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2. **Row subquery**: It returns a single row or multiple rows of two or more values.
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```sql
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```sql
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SELECT * FROM student
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SELECT * FROM student
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