Tinyint
Tinyint is one of the Exact number data types that use integer data.
Varchar
A varchar or variable character field is a set of character data of indeterminate length.
Others
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Using varchar is less efficient than using tinyint like aju john suggested in his comment but unless i m dealing with a really performance-critical or a huge table - i find it easier to deal with from question Alternative to ENUM Datatype in MySQL |
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As varchar n takes spaces much more than tinyint and your main table is table2 so the second scenario is more optimize from question Is it more efficient to have a table with one of its columns mostly empty or make a new table and refer to it? |
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I always use tinyint;it takes up less space than a varchar and is much better for speed and indexing from question Flag columns, Varchar or INT? |
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I think tinyint is better than varchar in this case from question Managing user points on Q&A site |