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CQL Datatypes in Cassandra

The Apache Cassandra database is the right choice when you need scalability and high availability without compromising performance. Linear implacability and proven fault-tolerance on commodity hardware or cloud infrastructure make it the perfect platform for mission-critical data. Cassandra’s support for replicating across multiple data centers is best-in-class, providing lower latency for your users and the peace of mind of knowing that you can survive regional outages.

CQL provides a rich set of built-in data types, including collection types. Along with these data types, users can also create their own custom data types.

These core tutorials will help you to learn the CQL Datatypes in Cassandra . For an in-depth understanding and 
practical experience, explore Cassandra Training Online.

The following table provides a list of built-in data types available in CQL.

Data Types

Data Type Constants Description
ascii strings Represents ASCII character string
bigint bigint Represents 64-bit signed long
blob blobs Represents arbitrary bytes
Boolean booleans Represents true or false
counter integers Represents counter column
decimal integers, floats Represents variable-precision decimal
double integers Represents 64-bit IEEE-754 floating point
float integers, floats Represents 32-bit IEEE-754 floating point
inet strings Represents an IP address, IPv4 or IPv6
int integers Represents 32-bit signed int
text strings Represents UTF8 encoded string
timestamp integers, strings Represents a timestamp
timeuuid uuids Represents type 1 UUID
uuid uuids Represents type 1 or type 4
UUID
varchar strings Represents uTF8 encoded string
varint integers Represents arbitrary-precision integer

Learn more about Cassandra Interview Questions in this blog post.

Collection Types

Cassandra Query Language also provides a collection data types. The following table provides a list of Collections available in CQL.

Collection Description
list A list is a collection of one or more ordered elements.
map A map is a collection of key-value pairs.
set A set is a collection of one or more elements.

User-defined datatypes:

Cqlsh provides users a facility of creating their own data types. Given below are the commands used while dealing with user defined datatypes.

For an Indepth knowledge on Cassandra, click on below

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