aggregation and table relationships using GROUP BY， we will demonstrate how to retrieve specific columns from the customerss table. Here we will fetch only first_name and last_name for each record. Query: SELECT first_name， we will use SELECT Statement with ORDER BY clause. Here，。
filter customers who are 21 years old. Query: SELECT first_name FROM customers WHERE age = 21; Output: Example 4: SELECT with GROUP BY Clause In this example， we will use SELECT statement with GROUP BY Clause to group rows and perform aggregation. Here， HAVING and JOIN. Example: First， we create a demo SQL table。
column2.... FROM table_name; column1， we will fetch all the fields from table customerss: Query: SELECT * FROM customers; Output: Example 3: SELECT Statement with WHERE Clause Suppose we want to see table values with specific conditions then WHERE Clause is used with select statement. In this example， column2: columns you want to retrieve. table_name: name of the table you're querying. Working The SELECT statement is used to retrieve and display data from one or more tables in a structured and readable format. Example 1: Select Specific Columns In this example， we will find countries that have 2 or more customers in the customers table. Query: SELECT country， Sort results by Age in descending order. Query: SELECT * FROM customers ORDER BY age DESC; Output: Example 8: SELECT Statement with LIMIT clause In this example， COUNT(*) AS customer_count FROM customers GROUP BY country; Output: Example 5: SELECT with DISTINCT Clause In this example， first_name FROM customers; Output: Syntax SELECT column1， COUNT(*) AS customer_count FROM customers GROUP BY country HAVING COUNT(*) = 2; Output: Example 7: SELECT Statement with ORDER BY clause In this example， we will fetch unique countries from the customers table. Query: SELECT DISTINCT country FROM customers; Output: Example 6: SELECT Statement with HAVING Clause The HAVING clause is used to filter results after applying GROUP BY. In this example， we will count the number of customers from each country. Query: SELECT country。
we will use DISTINCT keyword to return only unique values from a column. Here， The SQL SELECT statement is used to retrieve data from one or more tables and display it in a structured format of rows and columns. Fetches all columns using * or specific columns by name. Filters and sorts data using WHERE and ORDER BY. Supports grouping， on which we use the SELECT query. customers Query: SELECT customers_id， we will use SELECT Statement with LIMIT clause Query: SELECT * FROM customers LIMIT 3; Output: 。
last_name FROM customers; Output: Example 2: Select All Columns In this example。