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When are the following commands used? 1.    Join Command 2.    Relations Command 3.    Export Command

When are the following commands used?

1.    Join Command

2.    Relations Command

3.    Export Command

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Answer #1

1. Join command is used to provide us with the ability to merge two files together using a common field in each file as the link between related lines in the files.

2. Relation command is used to define a relation between two analytics tables. Relation command uses the relation which is specified in the statement.

3. The export command is used to mark an environment variable that is to be exported with any newly forked child processes and thus it allows a child process to inherit all marked variables.

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