Category: SQL

SQL TRUNCATE TABLE is a command used in Structured Query Language (SQL) to delete all the data from a table in a database. The TRUNCATE TABLE statement is a data manipulation language (DML) command that can be used to remove all the data from a table quickly and efficiently. When you use the TRUNCATE TABLE…(Continue Reading)

SQL is a standard language used for managing relational databases. It provides a wide range of commands and functions to perform various operations on a database. One of the essential commands in SQL is DROP TABLE, which is used to delete a table from a database. Syntax The syntax for using the DROP TABLE command…(Continue Reading)

SQL ALTER TABLE is a statement that allows you to modify the structure of an existing database table. This can include changing the name of the table, adding or removing columns, modifying the data type or length of a column, and setting constraints on the table. The syntax for the ALTER TABLE statement varies depending…(Continue Reading)

The SQL HAVING clause is a component of the SQL SELECT statement that allows you to filter the results of an aggregation based on a specific condition. In other words, it enables you to apply conditions to grouped data after the GROUP BY clause has been applied. The HAVING clause is similar to the WHERE…(Continue Reading)

The GROUP BY clause is a powerful feature of the Structured Query Language (SQL) that allows you to group the result set of a query by one or more columns. This clause is commonly used in combination with aggregate functions, such as COUNT, SUM, AVG, MIN, and MAX, to calculate summary statistics for each group.…(Continue Reading)

The SQL ORDER BY clause is used to sort the result set of a SELECT statement in a specified order. It allows you to sort the rows returned by a query based on one or more columns. The syntax for the ORDER BY clause is: SELECT column1, column2, … FROM table_name ORDER BY column1 [ASC|DESC],…(Continue Reading)

SQL LIKE is a clause used in SQL statements to search for patterns in a database. It is used in conjunction with the SELECT, UPDATE, and DELETE statements to filter records based on a specified pattern. The LIKE operator is often used to search for a specific string of characters within a column in a…(Continue Reading)

SQL BETWEEN is a conditional operator that is used to select values within a specified range. It is used in SQL queries to filter data based on a range of values. The BETWEEN operator is used with the WHERE clause to specify the range of values to be selected. Syntax The syntax for using SQL…(Continue Reading)

In SQL, the AND and OR operators are used to combine multiple conditions in a WHERE clause of a SELECT statement. The AND operator is used to combine two or more conditions, and it returns true only when all the conditions are satisfied. For example, the following query returns all the records from the Customers…(Continue Reading)

The WHERE clause is an important part of SQL (Structured Query Language), which is used to extract data from a database. The WHERE clause is used to filter the rows of data returned by a SELECT statement, based on a specified condition. Syntax The syntax of the WHERE clause is as follows: SELECT column1, column2,…(Continue Reading)