Retrieving Individual Columns
What is SQL?
SQL is a programming language for user interaction with databases, used to query, update, and manage databases.
Database
A database is an organized structure designed to store, modify, and process large amounts of data.
Why SQL Matters
SQL is essential for managing and querying databases efficiently. It is widely used due to its standardization, scalability, and ability to ensure data integrity. SQL's integration with other technologies makes it a versatile tool in various applications, supporting real-time data processing and decision-making.
Let's get started! In this course, we will work with a country database containing a country table. You can see it under the code editor on the right bottom corner.
SQL Syntax Explanation
To retrieve data from a database, SQL uses the SELECT statement. Here's the basic syntax:
- SELECT: specifies the columns to retrieve;
- FROM: specifies the table from which to retrieve the data.
For example, to get the sample column from the sample_table table, the syntax is:
SELECT sample FROM sample_table;
The following query will return all entries in the continent column from the country table:
1SELECT continent FROM country;
In our previous query, we utilized the SELECT to retrieve a single continent column from the country table.
It's important to note that you must specify the column name immediately after the SELECT keyword, and the FROM keyword specifies the name of the table from which we wish to retrieve data.
1. What does the SELECT statement do in SQL?
2. What is the purpose of the FROM keyword in an SQL query?
Thanks for your feedback!
Ask AI
Ask AI
Ask anything or try one of the suggested questions to begin our chat
What other columns can I select from the country table?
Can you explain more about the SELECT statement?
How do I retrieve multiple columns from the country table?
Awesome!
Completion rate improved to 2.38Retrieving Individual Columns
Swipe to show menu
What is SQL?
SQL is a programming language for user interaction with databases, used to query, update, and manage databases.
Database
A database is an organized structure designed to store, modify, and process large amounts of data.
Why SQL Matters
SQL is essential for managing and querying databases efficiently. It is widely used due to its standardization, scalability, and ability to ensure data integrity. SQL's integration with other technologies makes it a versatile tool in various applications, supporting real-time data processing and decision-making.
Let's get started! In this course, we will work with a country database containing a country table. You can see it under the code editor on the right bottom corner.
SQL Syntax Explanation
To retrieve data from a database, SQL uses the SELECT statement. Here's the basic syntax:
- SELECT: specifies the columns to retrieve;
- FROM: specifies the table from which to retrieve the data.
For example, to get the sample column from the sample_table table, the syntax is:
SELECT sample FROM sample_table;
The following query will return all entries in the continent column from the country table:
1SELECT continent FROM country;
In our previous query, we utilized the SELECT to retrieve a single continent column from the country table.
It's important to note that you must specify the column name immediately after the SELECT keyword, and the FROM keyword specifies the name of the table from which we wish to retrieve data.
1. What does the SELECT statement do in SQL?
2. What is the purpose of the FROM keyword in an SQL query?
Thanks for your feedback!
