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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)

In SQL, the DISTINCT keyword is used to retrieve unique values from a table or a result set. It is often used in conjunction with the SELECT statement to filter out duplicate rows. Syntax The syntax for using DISTINCT is as follows: SELECT DISTINCT column1, column2, … FROM table_name; In this syntax, the column names…(Continue Reading)

The SQL SELECT statement is one of the fundamental commands used in relational databases to retrieve data. It allows users to query a database table and return a set of data that meets specific criteria. Syntax The basic syntax of the SELECT statement is as follows: SELECT column1, column2, …, columnN FROM table_name WHERE condition;…(Continue Reading)

The SQL DELETE statement is used to delete records from a database table. It allows you to remove one or more rows from a table that match a specific condition. Syntax The basic syntax of the DELETE statement is as follows: DELETE FROM table_name WHERE condition; Here, table_name refers to the name of the table…(Continue Reading)

The SQL UPDATE statement is used to modify existing records in a table. It allows you to change the values of one or more columns in one or more rows of a table based on specified conditions. Syntax The basic syntax for the UPDATE statement is as follows: UPDATE table_name SET column1 = value1, column2…(Continue Reading)