What are types of sub-queries?

  1. Single-row subquery, where the subquery returns only one row.
  2. Multiple-row subquery, where the subquery returns multiple rows and
  3. Multiple column subquery, where the subquery returns multiple columns.

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Since March 2011, have 8+ years of professional experience on software development, currently working as Senior Software Engineer at s3 Innovate Pte Ltd.

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