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What’s the difference between VARCHAR(255) and TINYTEXT string types in MySQL?
Each of them allows to store strings with a maximum length of 255 characters. Storage requirements are also the same. When should I prefer one over another?
You cannot assign a
DEFAULTvalue to aTINYTEXTand you cannot create an unprefixed index on the latter.Internally, additional objects are allocated in memory to handle
TEXT(incl.TINYTEXT) columns which can cause memory fragmentation on the large recordsets.Note that this only concerns the column’s internal representation in the recordsets, not how they are stored on the disk.