Introduction In this chapter, we will learn about the FOREIGN KEY constraint in SQL. The FOREIGN KEY constraint is used to link two tables together. This chapter will cover the syntax, usage, and provide examples to help you understand how to use the FOREIGN KEY constraint effectively. What is a Foreign Key? A foreign key …
Introduction In this chapter, we will learn about the PRIMARY KEY constraint in SQL. The PRIMARY KEY constraint uniquely identifies each record in a database table. This chapter will cover the syntax, usage, and provide examples to help you understand how to use the PRIMARY KEY constraint effectively. What is a Primary Key? A primary …
Introduction In this chapter, we will learn how to use aliases in SQL. Aliases are used to give a temporary name to a table or a column in a SQL query. This chapter will cover the syntax, usage, and provide examples to help you understand how to use aliases effectively. What is an Alias? An …
Introduction In this chapter, we will learn how to use the UNION operator in SQL. The UNION operator is used to combine the result sets of two or more SELECT statements into a single result set. This chapter will cover the syntax, usage, and provide examples to help you understand how to use the UNION …
Introduction In this chapter, we will learn how to use the BETWEEN operator in SQL. The BETWEEN operator is used to filter the result set within a specified range. This chapter will cover the syntax, usage, and provide examples to help you understand how to use the BETWEEN operator effectively. What is the BETWEEN Operator? …
Introduction In this chapter, we will learn how to use the IS NULL operator in SQL. The IS NULL operator is used to test for empty values (NULL values) in a database. This chapter will cover the syntax, usage, and provide examples to help you understand how to use the IS NULL operator effectively. What …
Introduction In this chapter, we will learn how to use the NOT operator in SQL. The NOT operator is used to negate a condition in a SQL query. This chapter will cover the syntax, usage, and provide examples to help you understand how to use the NOT operator effectively. What is the NOT Operator? The …
Introduction In this chapter, we will learn how to use the OR operator in SQL. The OR operator is used to combine multiple conditions in a SQL query. This chapter will cover the syntax, usage, and provide examples to help you understand how to use the OR operator effectively. What is the OR Operator? The …
Introduction In this chapter, we will learn how to use the AND operator in SQL. The AND operator is used to combine multiple conditions in a SQL query. This chapter will cover the syntax, usage, and provide examples to help you understand how to use the AND operator effectively. What is the AND Operator? The …
Introduction In this chapter, we will learn how to use the CASE statement in SQL. The CASE statement is used to provide if-then-else type of logic to SQL queries. This chapter will cover the syntax, usage, and provide examples to help you understand how to use the CASE statement effectively. What is the CASE Statement? …
Introduction In this chapter, we will learn how to use the LIKE operator in SQL. The LIKE operator is used to search for a specified pattern in a column. This chapter will cover the syntax, usage, and provide examples to help you understand how to use the LIKE operator effectively. What is the LIKE Operator? …
Introduction In this chapter, we will learn how to use the IN operator in SQL. The IN operator is used to filter the result set based on a list of specified values. This chapter will cover the syntax, usage, and provide examples to help you understand how to use the IN operator effectively. What is …
Introduction In this chapter, we will learn how to use the HAVING clause in SQL. The HAVING clause is used to filter groups of rows created by the GROUP BY clause based on specified conditions. This chapter will cover the syntax, usage, and provide examples to help you understand how to use the HAVING clause …
Introduction In this chapter, we will learn how to use the GROUP BY clause in SQL. The GROUP BY clause is used to arrange identical data into groups. This is particularly useful when combined with aggregate functions to summarize data. This chapter will cover the syntax, usage, and provide examples to help you understand how …
Introduction In this chapter, we will learn how to use the ORDER BY clause in SQL to sort the results of a query. The ORDER BY clause is used to sort the result set of a query by one or more columns. This chapter will cover the syntax, usage, and provide examples to help you …
Introduction In this chapter, we will learn how to use the WHERE clause in SQL to filter the results of a query. The WHERE clause is used to specify conditions that must be met for the rows to be included in the result set. This chapter will cover the syntax, usage, and provide examples to …
Introduction In this chapter, we will learn how to use the DELETE statement in SQL. The DELETE statement is used to remove one or more rows from a table. This chapter will cover the syntax, usage, and provide examples to help you understand how to use the DELETE statement effectively. What is the DELETE Statement? …
Introduction In this chapter, we will learn how to use the UPDATE statement in SQL. The UPDATE statement is used to modify the existing records in a table. This chapter will cover the syntax, usage, and provide examples to help you understand how to use the UPDATE statement effectively. What is the UPDATE Statement? The …
Introduction In this chapter, we will learn how to use the INSERT INTO…SELECT statement in SQL. This statement is used to copy data from one table and insert it into another table. It is useful for copying data between tables, transforming data, and performing bulk inserts. This chapter will cover the syntax, usage, and provide …
Introduction In this chapter, we will learn how to use the SELECT COUNT statement in SQL. The SELECT COUNT statement is used to return the number of rows that match a specified condition. This is useful for obtaining summary statistics and performing aggregate calculations. This chapter will cover the syntax, usage, and provide examples to …
Introduction In this chapter, we will learn how to retrieve unique values from a table using the SELECT DISTINCT statement in SQL. The SELECT DISTINCT statement is used to return only distinct (unique) values from a table. This chapter will cover the syntax, usage, and provide examples to help you understand how to use the …
Introduction In this chapter, we will learn how to use the SELECT statement in SQL. The SELECT statement is used to retrieve data from a database. It is one of the most commonly used commands in SQL, as it allows you to query and fetch data from one or more tables. This chapter will cover …
Introduction In this chapter, we will learn how to use the INSERT statement to add multiple rows of data into a table in a single statement. This is a more efficient way to insert multiple rows compared to inserting each row individually. We will cover the syntax, provide examples, and demonstrate how to handle multiple …
Introduction In this chapter, we will learn how to use the INSERT statement in SQL. The INSERT statement is used to add new rows of data into a table. This chapter will cover the syntax, different ways to insert data, and provide examples to help you understand how to use the INSERT statement effectively. What …
Introduction In this chapter, we will learn how to use the ALTER TABLE statement in SQL. The ALTER TABLE statement is used to modify the structure of an existing table. This includes adding, deleting, or modifying columns, and adding or dropping constraints. This chapter will cover the syntax, usage, and examples to help you understand …