![]() In both Navicat for MySQL and Navicat Premium, the Object Designer allows you to create and maintain all sorts of database objects, including Tables, Views, Functions, Indexes, and, of course, columns. Selecting VARCHAR and TEXT Types in Navicat MEDIUMTEXT stores strings up to 16 MB, and LONGTEXT up to 4 GB! It should go without saying that you should avoid using these larger types unless you have a lot of storage space. The latter two are for storing textual content that is longer than 65,535 characters. Should you require the TEXT type, know that there are actually three flavors in addition to TEXT, there are also MEDIUMTEXT or LONGTEXT varieties. Using a TEXT column in a sort will require the use of a disk-based temporary table, as the MEMORY (HEAP) storage engine.Meanwhile, TEXT is stored off table with the table having a pointer to the location of the actual storage. Of course, how much faster depends on both your data and your hardware. VARCHAR is stored inline with the table (at least for the MyISAM storage engine), making it potentially faster when the size is reasonable.A VARCHAR can be part of an index whereas a TEXT field requires you to specify a prefix length, which can be part of an index.TEXT fields have a fixed max size of 65,535 characters. The VAR in VARCHAR means that you can set the max size to anything between 1 and 65,535.While both data types share a maximum length of 65,535 characters, there are still a few differences: Some Differences Between VARCHAR and TEXT In today's blog, we'll outline the key differences between the two and layout the factors to consider when deciding which data type to go with. For those of us who design database tables, choosing between VARCHAR and TEXT now became more challenging as a result. That made the VARCHAR type more similar to TEXT than ever before. One of the changes in MySQL version 5.0.3 included an increase to the maximum length of VARCHAR fields from 255 to 65,535 characters. Choosing Between VARCHAR and TEXT in MySQL by Robert Gravelle ![]()
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