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Explain SQL joins

Joins combine rows from tables based on a related key, with inner and outer joins deciding what unmatched rows survive.

SQL Easy Theory

Explain SQL joins

Joins combine rows from tables based on a related key, with inner and outer joins deciding what unmatched rows survive.

  • INNER keeps matches
  • LEFT keeps all left rows
  • Join condition matters
#database #joins #sql

Explain SQL joins