#sql union all

[krishna337]

SQL UNION Operator

The SQL UNION operator is used to combine the result sets of 2 or more SELECT statements.It Removes duplicate rows between various SELECT statements. To use this UNION operator, each SELECT statement must have The same number of columns selected. The same number of column expressions. Type the same data and have it in the same sequence. UNION Syntax SELECT columnname(s) FROM…

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[prashantjayaram]

Overview of SQL UNION

Overview of SQL UNION

This article will provide a deep dive into the SQL UNION operator, describing its many uses along with examples and explore some common questions like the differences between UNION vs UNION ALL. To address real-world data requirements, we may need to combine result sets from multiple data sources so that we could do data analysis or create new datasets. The datasets may be identical but there are…

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