Category: SQL

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)

The SQL INSERT statement is used to add new data records into a table in a relational database. The INSERT statement is one of the fundamental SQL commands and is essential for adding new data to a database. Syntax The basic syntax for the INSERT statement is as follows: INSERT INTO table_name (column1, column2, column3,…(Continue Reading)

SQL CREATE TABLE is a statement that is used to create a new table in a database. A table is a collection of data that is organized in rows and columns, similar to a spreadsheet. Each column represents a specific data type, while each row represents a unique record in the table. Syntax The basic…(Continue Reading)