To aggregate the results of two or more SELECT operations, use the UNION operator. Within UNION, every SELECT statement must have the same amount of columns. The data types in the columns must also be similar.
The Union operator joins the results of two or more searches into a single result set that contains all of the rows from all of the Union's inquiries. It combines two more searches and removes duplicates in this operation. Tables 'A' and 'B', for example, have 1,2, and 3, while table 'C' has 3,4,5.
The UNION operator in SQL Server is used to join the results of two or more SELECT statements. Between the several SELECT statements, it removes duplicate rows. In the result sets, each SELECT statement within the UNION operator must have the same number of columns with similar data types.
Union is faster since it just passes the first SELECT command, parses the second, and adds the results to the end of the output table.
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Arvind Kumar
5
very nice course for begginer to under stand
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hemant
5
Hello sir, explaination is excellent. I have a request please send the db in excel or SQL file
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Juboraj Juboraj
4
Explain details & easy to understand.
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Aman Kanaujia
4
All good , but provide the data also for the assignment , Without data the interest is less day by day from the course. So, try to solve this problem as asap.
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Snehil
4
Everything is good but keyboard sounds more harsh and overlap your voice whereas this course is best.
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FAROOK MOHAMMAD
5
Hello sir, explaination is excellent. I have a request please send the db in excel or SQL file.
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Hari Prakash
4
In SQL Join Function's 2nd video - Teacher's voice dose not match with background content that are plays
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Aakash Mavar
5
Hello sir
Mera Abhi graduation hu he Mene Mechanical Engineering BTech ki Hai me Data analysis me Apna career Bana skat ho Kya
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