$db = mysql_connect("HOST", "USERNAME", "PASSWORD");
TINYINT: The range of this data type is -128 - +127 or 0 – 256 and occupies 1 byte.
BIT: Bit uses 8 bytes and stores only binary data.
CHAR_LENGTH includes leading and trailing blanks and the string-termination character LENGTH excludes trailing blanks and the string-termination character. It does not exclude leading blanks.
MySQL CHAR_LENGTH and LENGTH - September 30, 2009 at 18:00 pm by Vidya SagarWhat is the difference between CHAR_LENGTH and LENGTH in MySQL?CHAR_LENGTH, as the name suggests, returns the number of characters / character count. The LENGTH returns the number of bytes / bytes count. To count the Latin characters, both lengths are the same. To count Unicode and other encodings, the lengths are different.
Query Cache in MySQL is used in scenarios when the same queries need to be executed on the same data set. These queries also return the same result. Query cache is most useful when there are tables that are not expected to change very often. It is important to note that the query cache does not return old data. If the tables are modified, any important entries in the query cache are flushed.
MySQL is a relational database management system which is an open source database.
FLOATs store floating point numbers with 8 place accuracy and take up 4 bytes. DOUBLEs store floating point numbers with 16 place accuracy and take up 8 bytes. REAL is a synonym of FLOAT for now.
Prior to MySQL 5.0.3: those are all synonyms. After MySQL 5.0.3: BIT data type can store 8 bytes of data and should be used for binary data.
What happens when the column is set to AUTO INCREMENT and you reach the maximum value for that table?
It stops incrementing. It does not overflow to 0 to prevent data losses, but further inserts are going to produce an error, since the key has been used already.