When it comes to columns such as INT (11) and TINYINT (3), the number in brackets isn’t actually that important. When you first look at them, it is easy assume that these numbers represent the maximum length of the column, but that is not the case. So what does INT (11) actuall...
These types are synonyms for TINYINT(1). A value of zero is considered false. Non-zero values are considered true: […] SoTINYINT(1)must be different in some way fromTINYINT(4)which is assumed by default when you leave the size out1. Still, you can store for example 100 into aTIN...
INT(1) can only hold the same values as TINYINT(1). this is not correct. the values held by INT are -2147483648 to 2147483647 or 0 to 4294967295 as posted above TINYINT can hold values -128 to 127 or 0 to 255 the value in brackets merely determines the ZEROFILL padding if defined...
The MySQL database stores values 0 and 1, rather than true and false. However, true or false is read during MySQL database migration, and the following error information
So, concluding:The size is neither bits nor bytes. It's just the display width, that is used when the field hasZEROFILL specified. If you see any more uses in the size value, please tell me. I am curious to know. 1 See this example:mysql> create table a ( a tinyint );Query OK...
The first one is in the example above. statusVARCHAR(255)NOTNULLdefault'draft' The next one will be enum: statusENUM('archived','deleted','draft','published')DEFAULT'draft', And the last one is an integer: statusTINYINT(1)UNSIGNEDNOTNULLDEFAULT'0' ...
http://everythingmysql.ning.com/profiles/blogs/data-type-confusion-what-is-an Over and over I see customers that don't understand whatint(11)really means. Their confusion is understandable. Many know what defining achar(10)means (a fixed-sized character string that allows up to 10 characters...
SoTINYINT(1)must be different in some way fromTINYINT(4)which is assumed by default when you leave the size out1. Still, you can store for example 100 into aTINYINT(1). Finally, let's come to the place of the manual where there is the biggest hint to what the number means: ...
In this post I'd like to present a small benchmark which shows MySQL performance when you use 3 different approaches: ENUM, VARCHAR and tinyint (+joined table) columns. In practice you can also often use 4th variant which is not comparable directly, which is using integer value and having...
int(2) is still a 32-bit integer; the (2) means virtually nothing. Consider TINYINT. Prefix indexes are virtually useless: KEY `ship_name_idx` (`Ship_LastName`(24),`Ship_FirstName`(8)), There is no advantage for (10) in this case: ...