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Using help and show to resolve query issues

To observe statistics on a table, we use the help stats command. This gives an overview of stats collected on the table level:

/*Help statistics*/HELP STATISTICS ON web_clicks;Date Time            Unique Values   Column Names‐‐‐‐‐‐‐‐             ‐‐‐‐‐‐‐‐         ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐   17/07/07 10:49:55       100              * (represent number of rows in table)17/07/07 10:49:55       100               date

Date Time: Represents the date and time of stats collected. Helps to identify how old stats are.
Unique Values: Number of unique values for a column, or combination of columns, in case of multi-column stats.
Column Name: Name of the column on which stats are collected. The HELP STATISTICS command is enhanced to show the expression statistics. It shows the name given ...

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