SQL – UNION vs UNION ALL Table of content UNION and UNION ALL operators are just the SQL implementation of algebraic set operators. Both of them are used to retrieve the rows from multiple tables and return them as one single table. The difference between these two operators is that UNION only returns distinct rows […]
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SQL – INTERSECT Table of content In mathematical set theory, the intersection of two sets is a collection of values that are common to both sets. In real-time scenarios, there will be a huge number of tables in a database that contains information. The user may find it challenging to gather common information from various […]
SQL – AND and OR Conjunctive Operators Table of content Operators are reserved words primarily used in SQL to perform various operations on data, like addition (+), subtraction (-), or comparison (==). Conjunctive operators, specifically used in boolean logic, combines two conditions in an SQL statement. The most common conjunctive operators are: AND (&&), which […]