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- Cassandra Tutorial
- Cassandra Keyspace Operations
- Cassandra Table Operations
- Cassandra CURD Operations
- Cassandra CQL Types
- Cassandra Useful Resources
- Selected Reading
Cassandra provides documented shell commands in addition to CQL commands. Given below are the Cassandra documented shell commands.
Help
The HELP command displays a synopsis and a brief description of all cqlsh commands. Given below is the usage of help command.
Capture
This command captures the output of a command and adds it to a file. For example, take a look at the following code that captures the output to a file named Outputfile.
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When we type any command in the terminal, the output will be captured by thefile given. Aureal multifunction devices driver download for windows. Given below is the command used and the snapshot of the output file.
You can turn capturing off using the following command.
Consistency
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This command shows the current consistency level, or sets a new consistency level.
Copy
This command copies data to and from Cassandra to a file. Given below is an example to copy the table named emp to the file myfile.
If you open and verify the file given, you can find the copied data as shown below.
Describe
This command describes the current cluster of Cassandra and its objects. The variants of this command are explained below.
Describe cluster − This command provides information about the cluster.
Describe Keyspaces − This command lists all the keyspaces in a cluster. Given below is the usage of this command.
M-audio mobile phones & portable devices driver download. Describe tables − This command lists all the tables in a keyspace. Given below is the usage of this command.
Describe table − This command provides the description of a table. Given below is the usage of this command.
Describe Type
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This command is used to describe a user-defined data type. Given below is theusage of this command.
Describe Types
This command lists all the user-defined data types. Given below is the usage of this command. Assume there are two user-defined data types: card and card_details.
Expand
This command is used to expand the output. Before using this command, you have to turn the expand command on. Given below is the usage of this command.
Note − You can turn the expand option off using the following command.
Exit
This command is used to terminate the cql shell.
Show
This command displays the details of current cqlsh session such as Cassandra version, host, or data type assumptions. Given below is the usage of this command.
Source
Using this command, you can execute the commands in a file. Suppose our input file is as follows −
Then you can execute the file containing the commands as shown below.