Andromeda Express's video: 01-SQL Interview Question:: Union And Union All In SQL

@01-SQL Interview Question:: Union And Union All In SQL

UNION merges the contents of two compatible tables into a single combined table. The difference between UNION and UNION ALL is that UNION will omit duplicate records whereas UNION ALL will include duplicate records. Please note that performance of UNION ALL will typically be better than UNION, because UNION requires the server to do the additional effort of removing all duplicates.

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This video was published on 2018-08-04 18:54:20 GMT by @step2c on Youtube. Andromeda Express has total 32.7K subscribers on Youtube and has a total of 91 video.This video has received 1 Likes which are lower than the average likes that Andromeda Express gets . @step2c receives an average views of 120.8K per video on Youtube.This video has received 0 comments which are lower than the average comments that Andromeda Express gets . Overall the views for this video was lower than the average for the profile.

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