Different Types of SQL Keys | Learn SQL

Types of SQL Keys A key is a single or combination of multiple fields in a table. Its is used to retrieve records or rows from data table according to the condition/requirement. Keys are also used to create relationship among different database tables or views. Below are different SQL Keys. Super Key Candidate Key Primary Key Alternate key Composite/Compound Key …

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SQL INSERT INTO Query | INSERT Command in SQL | Insert Statement in SQL

SQL INSERT INTO Statement The SQL INSERT statement is used to insert a one or more records in a table. There are two syntax’s for the INSERT statement depending on whether you are inserting one record or multiple records. Syntax It will work, when we inserting a single record in SQL. While inserting a row, if you are adding value …

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SQL Select Query and Use of Select Command | Learn DBMS | Tech-Mirror

SQL SELECT Query SQL SELECT Query is used to getting or  retrieve data from a table in the database. It is most commonly and highly used SQL statement in DBMS. A query may give result from specified columns or from all of the columns in the table. To create a simple SQL SELECT Statement, you must specify the column(s) name …

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What is SQL? | List of SQL Commands | SQL Queries

What is SQL? SQL (Structured Query Language) is used to perform operations on the records stored in database like creating and modifying tables, updating records, deleting records, views, functions etc. Structured Query Language is just a query language, it is not a database or tables. To perform SQL queries, first you need to install any database for example Oracle, MySQL, MongoDB, PostGre …

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