SQL – Quick Guide SQL – Overview SQL is a language to operate databases; it includes database creation, deletion, fetching rows, modifying rows, etc. SQL is an ANSI (American National Standards Institute) standard language, but there are many different versions of the SQL language. What is SQL? SQL is Structured Query Language, which is a […]
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SQL – Useful Resources The following resources contain additional information on SQL. Please use them to get more in-depth knowledge on this topic. 36 Lectures 5 hours 15 Lectures 1.5 hours 40 Lectures 3 hours Khóa học lập trình tại Toidayhoc vừa học vừa làm dự án vừa nhận lương: Khóa học lập trình nhận […]
SQL – IN vs EXISTS Table of content In SQL, we use the IN operator to simplify queries and reduce the need for multiple OR conditions. It allows us to match a value against a list of values. On the other hand, the EXISTS operator checks whether one or more rows exist in a subquery […]