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Left Semi Join

notPlancha answered on April 6, 2023 Popularity 6/10 Helpfulness 1/10

answer Left Semi Join

Left Semi Join

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A  +----+---------+  B  +----+---------+
   | Id |  Data   |     | Id |  Data   |
   +----+---------+     +----+---------+
   |  1 | DataA11 |     |  1 | DataA11 |
   |  1 | DataA12 |     |  1 | DataA12 |
   |  1 | DataA13 |     |  1 | DataA13 |
   |  2 | DataA21 |     |  2 | DataA21 |
   |  3 | DataA31 |     |  3 | DataA31 |
   +----+---------+     +----+---------+

A left join B

┌────┬─────────┐
│ Id │  Data   │
├────┼─────────┤
│  1 │ DataA11 │
│  1 │ DataA12 │
│  1 │ DataA13 │
│  2 │ DataA21 │
└────┴─────────┘

Popularity 6/10 Helpfulness 1/10 Language whatever

Source: stackoverflow.com

Tags: semi-join whatever

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Contributed on Apr 06 2023

notPlancha

0 Answers Avg Quality 2/10

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