Hello All,

Hope this post finds you in good health and spirit.

Structured Query Language, abbreviated as SQL, is a domain-specific language used in programming and designed for managing data held in a relational database management system, or for stream processing in a relational data stream management system.

An good developer must be familiar with a few commands in SQL because it is such a strong development tool. The SQL queries listed below are important for coding and optimization. Almost every system that interacts with a SQL database will be affected by each query in the SQL tutorial.

SQL CREATE TABLE Statement

The SQL CREATE TABLE Statement
The CREATE TABLE statement is used to create a new table in a database.

CREATE TABLE table_name (
column1 datatype,
column2 datatype,
column3 datatype,
....
);

The column parameters specify the names of the columns of the table.

The datatype parameter specifies the type of data the column can hold (e.g. varchar, integer, date, etc.).

Tip: For an overview of the available data types, go to our complete Data Types Reference.

SQL CREATE TABLE Example

The following example creates a table called “Persons” that contains five columns: PersonID, LastName, FirstName, Address, and City:

CREATE TABLE Persons (
PersonID int,
LastName varchar(255),
FirstName varchar(255),
Address varchar(255),
City varchar(255)
);

The PersonID column is of type int and will hold an integer.

The LastName, FirstName, Address, and City columns are of type varchar and will hold characters, and the maximum length for these fields is 255 characters.

The empty “Persons” table will now look like this:

PersonID LastName FirstName Address City

Tip: The empty “Persons” table can now be filled with data with the SQL INSERT INTO statement.

Create Table Using Another Table
A copy of an existing table can also be created using CREATE TABLE.

The new table gets the same column definitions. All columns or specific columns can be selected.

If you create a new table using an existing table, the new table will be filled with the existing values from the old table.

CREATE TABLE new_table_name AS
SELECT column1, column2,...
FROM existing_table_name
WHERE ....;

The following SQL creates a new table called “TestTables” (which is a copy of the “Customers” table):

CREATE TABLE TestTable AS
SELECT customername, contactname
FROM customers;

So, that’s all in this blog. I will meet you soon with next stuff .Have a nice day !!!

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