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What are the two major components of SQL and what function do they serve?
Wiki User
∙ 12y ago
The Data Definition Language (DDL). This component of the SQL language is used to create and modify tables and other objects in the database. For tables there are three main commands:
CREATE TABLE tablename to create a table in the database
DROP TABLE tablename to remove a table from the database
ALTER TABLE tablename to add or remove columns from a table in the database.
The Data Manipulation Language (DML) component of the SQL language is used to manipulate data within a table. There are four main commands:
then,
SELECT to select rows of data from a table
INSERT to insert rows of data into a table
UPDATE to change rows of data in a table
DELETE to remove rows of data from a table
Wiki User
∙ 12y ago
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Why do you need to study SQL?
If you want to learn to work with databases, then knowing SQL can be very important. It is a language that allows you to manipulate data. You will find variations of SQL in many database applications. You can work with databases without knowing SQL, but it is a major advantage to know it, as you will be able to do a lot more.If you want to learn to work with databases, then knowing SQL can be very important. It is a language that allows you to manipulate data. You will find variations of SQL in many database applications. You can work with databases without knowing SQL, but it is a major advantage to know it, as you will be able to do a lot more.If you want to learn to work with databases, then knowing SQL can be very important. It is a language that allows you to manipulate data. You will find variations of SQL in many database applications. You can work with databases without knowing SQL, but it is a major advantage to know it, as you will be able to do a lot more.If you want to learn to work with databases, then knowing SQL can be very important. It is a language that allows you to manipulate data. You will find variations of SQL in many database applications. You can work with databases without knowing SQL, but it is a major advantage to know it, as you will be able to do a lot more.If you want to learn to work with databases, then knowing SQL can be very important. It is a language that allows you to manipulate data. You will find variations of SQL in many database applications. You can work with databases without knowing SQL, but it is a major advantage to know it, as you will be able to do a lot more.If you want to learn to work with databases, then knowing SQL can be very important. It is a language that allows you to manipulate data. You will find variations of SQL in many database applications. You can work with databases without knowing SQL, but it is a major advantage to know it, as you will be able to do a lot more.If you want to learn to work with databases, then knowing SQL can be very important. It is a language that allows you to manipulate data. You will find variations of SQL in many database applications. You can work with databases without knowing SQL, but it is a major advantage to know it, as you will be able to do a lot more.If you want to learn to work with databases, then knowing SQL can be very important. It is a language that allows you to manipulate data. You will find variations of SQL in many database applications. You can work with databases without knowing SQL, but it is a major advantage to know it, as you will be able to do a lot more.If you want to learn to work with databases, then knowing SQL can be very important. It is a language that allows you to manipulate data. You will find variations of SQL in many database applications. You can work with databases without knowing SQL, but it is a major advantage to know it, as you will be able to do a lot more.If you want to learn to work with databases, then knowing SQL can be very important. It is a language that allows you to manipulate data. You will find variations of SQL in many database applications. You can work with databases without knowing SQL, but it is a major advantage to know it, as you will be able to do a lot more.If you want to learn to work with databases, then knowing SQL can be very important. It is a language that allows you to manipulate data. You will find variations of SQL in many database applications. You can work with databases without knowing SQL, but it is a major advantage to know it, as you will be able to do a lot more.
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