Cassandra - Create Table

Creating a Table

You can create a table using the command CREATE TABLE. Given below is the syntax for creating a table.


('<column-definition>' , '<column-definition>')
(WITH <option> AND <option>)

Defining a Column

You can define a column as shown below.

column name1 data type,
column name2 data type,


age int,
name text

Primary Key

The primary key is a column that is used to uniquely identify a row. Therefore,defining a primary key is mandatory while creating a table. A primary key is made of one or more columns of a table. You can define a primary key of a table as shown below.

CREATE TABLE tablename(
   column1 name datatype PRIMARYKEY,
   column2 name data type,
   column3 name data type.


CREATE TABLE tablename(
   column1 name datatype PRIMARYKEY,
   column2 name data type,
   column3 name data type,
   PRIMARY KEY (column1)


Given below is an example to create a table in Cassandra using cqlsh. Here we are −

  • Using the keyspace tutorialspoint

  • Creating a table named emp

It will have details such as employee name, id, city, salary, and phone number. Employee id is the primary key.

cqlsh> USE tutorialspoint;
cqlsh:tutorialspoint>; CREATE TABLE emp(
   emp_id int PRIMARY KEY,
   emp_name text,
   emp_city text,
   emp_sal varint,
   emp_phone varint


The select statement will give you the schema. Verify the table using the select statement as shown below.

cqlsh:tutorialspoint> select * from emp;

 emp_id | emp_city | emp_name | emp_phone | emp_sal

(0 rows)

Here you can observe the table created with the given columns. Since we have deleted the keyspace tutorialspoint, you will not find it in the keyspaces list.

Creating a Table using Java API

You can create a table using the execute() method of Session class. Follow the steps given below to create a table using Java API.

Step1: Create a Cluster Object

First of all, create an instance of the Cluster.builder class of com.datastax.driver.core package as shown below.

//Creating Cluster.Builder object
Cluster.Builder builder1 = Cluster.builder();

Add a contact point (IP address of the node) using the addContactPoint() method of Cluster.Builder object. This method returns Cluster.Builder.

//Adding contact point to the Cluster.Builder object
Cluster.Builder builder2 = build.addContactPoint( "" );

Using the new builder object, create a cluster object. To do so, you have a method called build() in the Cluster.Builder class. The following code shows how to create a cluster object.

//Building a cluster
Cluster cluster =;

You can build a cluster object using a single line of code as shown below.

Cluster cluster = Cluster.builder().addContactPoint("").build();

Step 2: Create a Session Object

Create an instance of Session object using the connect() method of Cluster class as shown below.

Session session = cluster.connect( );

This method creates a new session and initializes it. If you already have a keyspace, you can set it to the existing one by passing the keyspace name in string format to this method as shown below.

Session session = cluster.connect(“ Your keyspace name ” );

Here we are using the keyspace named tp. Therefore, create the session object as shown below.

Session session = cluster.connect(“ tp” );

Step 3: Execute Query

You can execute CQL queries using the execute() method of Session class. Pass the query either in string format or as a Statement class object to the execute() method. Whatever you pass to this method in string format will be executed on the cqlsh.

In the following example, we are creating a table named emp. You have to store the query in a string variable and pass it to the execute() method as shown below.

String query = "CREATE TABLE emp(emp_id int PRIMARY KEY, "
   + "emp_name text, "
   + "emp_city text, "
   + "emp_sal varint, "
   + "emp_phone varint );";

Given below is the complete program to create and use a keyspace in Cassandra using Java API.

import com.datastax.driver.core.Cluster;
import com.datastax.driver.core.Session;

public class Create_Table {

   public static void main(String args[]){

      String query = "CREATE TABLE emp(emp_id int PRIMARY KEY, "
         + "emp_name text, "
         + "emp_city text, "
         + "emp_sal varint, "
         + "emp_phone varint );";
      //Creating Cluster object
      Cluster cluster = Cluster.builder().addContactPoint("").build();
      //Creating Session object
      Session session = cluster.connect("tp");
      //Executing the query
      System.out.println("Table created");

Save the above program with the class name followed by .java, browse to the location where it is saved. Compile and execute the program as shown below.

$java Create_Table

Under normal conditions, it should produce the following output −

Table created