Build a tabular report about the columns of a Tabular object:

Include only some columns and report only about some properties:

Take tabular data about the Titanic passengers:

Compute a structural summary of the data:

Add more properties, including information about possible duplication of entries in each column:

Take tabular data about the elements:

Find a structural summary for some of the columns:

Restrict to only one column:

Report only about the original columns that contain "u" in their name:

Restrict to the columns of "Integer64" type:

Take tabular data about the Titanic passengers:

Find a structural report with the default properties:

Include all available properties, including some reporting about the possible presence of duplicate entries:

Select only one property:

Select several properties:

Find out which columns of a Tabular object could be used as key columns for indexing it:

Only duplicate-free columns can be key columns, so that rows are uniquely identified by their values:

Use for example the "state" column, after extracting a subset of the columns:

TabularStructure[tab] returns a Tabular object whose key column contains the column keys of tab:

TabularStructure of an anonymous Tabular object does not have the key column:

Take a Tabular object:

A structural summary about zero columns will contain no rows:

A structural summary with zero properties will contain no columns other than the key column: