Author: sqlitetutor_obng7r

SQLite AVG

The SQLite AVG function calculates and returns the average of all values in a set of non-NULL values. Typically, a set of values represents the values of multiple records in a column. The SQLite AVG function is an aggregate type function and is used in calculations. Syntax Here is the syntax of SQLite AVG function:…(Continue Reading)

SQLite case

SQLite CASE statement is a control flow statement that allows you to execute a block of SQL code based on a specified condition. SQLite CASE corresponds to IF-THEN-ELSE in other programming languages. The SQLite case statement has two forms: The first form of SQLite case statement evaluates the expression and compares it with value. If…(Continue Reading)

SQLite WITH clause

The SQLite WITH clause is used to specify temporary tables that exist for the duration of a query. These temporary tables can be used to store intermediate results and improve performance. For example, consider a query that needs to compute the sum of two columns from a table: SELECT A + B FROM MyTable; This…(Continue Reading)

SQLite Subquery

A SQLite subquery is a query that is nested within another SQL query. A subquery can be used to return data from multiple tables, or to calculate values based on data in other tables. Subqueries can also be used with the ORDER BY clause to sort the results of a query. SQLite subqueries can be…(Continue Reading)

SQLite CROSS JOIN

The SQLite CROSS JOIN returns the Cartesian product of the tables used in the join. SQLite CROSS JOIN returns all rows from both tables, if the ON clause with matching condition is not used. Syntax The SQLite CROSS JOIN syntax is as follows: SELECT column1, column2, … FROM left_table CROSS JOIN right_table; Example Table of…(Continue Reading)

SQLite LEFT JOIN

The SQLite LEFT JOIN is used to return all records from the left table, even if there is no match with the right table. Syntax The SQLite LEFT JOIN syntax is as follows: SELECT column1, column2, … FROM left_table LEFT JOIN right_table ON condition; Example Table of students student_id first_name last_name birthday address_id 1 Paul…(Continue Reading)