Tag: SQL
SQL operator SELECT TOP is used to extract records from one or more tables in a database and limit the number of records to be returned based on a fixed value or percentage.Tip: SELECT TOP is...
SQL operator SELECT LIMIT is used to extract records from one or more tables in the database and limit the number of records to be returned based on the limit value.Tip: SELECT LIMIT is not...
SQL Server operator ORDER BY is used to sort records in the SELECT query result set. Syntax for ORDER BY statement in SQL Sorting by one field:SELECT * FROM tab n WHERE condition ORDER BY...
SQL Server GROUP BY operator can be used in SELECT operator to collect data by several records and group results by one or more columns. Syntax of GROUP BY statement in SQL SELECT expr1, expr2,...
SQL Server the most popular database management systems (DBMS) in the world. This DBMS is suitable for a variety of projects: from small applications to large highly loaded projects.SQL...
SQL RTRIM - The RTRIM function can remove all specified characters from the right side of the string in Oracle/PLSQL. Syntax of the Oracle/PLSQL RTRIM function RTRIM( string_d, [ trim_string_d...
IDENTITY SQL - The table property in Microsoft SQL Server is IDENTITY_INSERT. Using this property, we can insert an explicit value into the autoincrement column with IDENTITY that was previously...
Microsoft SQL Server 2012 - a fully ready-to-use information platform in the cloud, which provides confidence in the reliability of business-critical systems when working with data and...
SQL server ports - The subsystems and components that Microsoft continues to complement SQL Server have significantly increased the number of network connections used by the platform....
SQL IIF function of T-SQL language, which is designed to simplify the writing of conditional constructions using the well-known expression CASE or operators IF...ELSE...THEN.IIF is a logical...
DDL / DML - If you have an Oracle database and want to explore the capabilities of the FIRST_VALUE analytics function yourself, then below we provide the DDL and DML that you will need. DDL...
The ISNULL SQL Server function checks the value of some expression. If it is NULL, the function returns a value which is passed as the second parameter: ISNULL(expression, value). Syntax of...
MySQL data types - When determining the columns of the table for them, you must specify the data type. Each column must have a data type. The data type determines what values can be stored in a...
AVG function (Average) in SQL Server (Transact-SQL) - AVG function returns the arithmetic mean for all found records. Arithmetic mean of a group of numbers is their sum divided by their...
INSERT INTO - is a T-SQL instruction designed to add data to a table, i.e. create new records. This instruction can be used both for adding one line to the table and for mass inserting data....
The CREATE TABLE instruction in SQL Server creates a new database table with all relevant columns of the required data type. The following is the basic form of the CREATE TABLE manual:CREATE...