When should I use Smallint in MySQL?
If you know that some columns in a table that will have millions of row or even an little table that will FK’ed to multi-million-row that doesn’t need an 4 bytes integer to store their data, but an 2 byte would suffice – use SMALLINT. If values in the range 0-255 is enough, TINYINT.
What is integer in MySQL?
INT in MySQL is an integer data type, which is a whole number. It allows numbers to be written without fractional part (no decimal component). For example, 1, 5, -10 is an integer type, while 1.5, 5/7 cannot be an integer. It is to note that an integer value can be positive, negative, or zero.
What does Int 4 mean in MySQL?
For example, INT(4) specifies an INT with a display width of four digits. This optional display width may be used by applications to display integer values having a width less than the width specified for the column by left-padding them with spaces.
What does Tinyint 4 mean?
255 unsigned. M is the display width. M indicates the maximum display width for integer types. … So realistically TinyInt(3) unsigned is sufficient to display the max value of 255 . Whereas TinyInt(4) is need to display -128 for instance.
What is difference between BigInt and int?
The int type takes 4 byte signed integer i.e. 32 bits ( 232 values can be stored). The BigInt type takes 8 byte signed integer i.e. 64 bits (264 values can be stored). Let us see an example.
What is means by INT 11 in MySQL?
11. In MySQL integer int(11) has size is 4 bytes which equals 32 bit. Signed value is : – 2^(32-1) to 0 to 2^(32-1)-1 = -2147483648 to 0 to 2147483647. Unsigned values is : 0 to 2^32-1 = 0 to 4294967295.
What is a medium int?
A medium-sized integer. The signed range is -8388608 to 8388607. The unsigned range is 0 to 16777215. ZEROFILL pads the integer with zeroes and assumes UNSIGNED (even if UNSIGNED is not specified). INT3 is a synonym for MEDIUMINT .
How many digits can Smallint hold?
The SMALLINT data type stores small whole numbers that range from –32,767 to 32,767. The maximum negative number, –32,768, is a reserved value and cannot be used. The SMALLINT value is stored as a signed binary integer.
How do I limit int in SQL?
If you want to limit the range of an integer column you can use a check constraint: create table some_table ( phone_number integer not null check (phone_number between 0 and 9999999999) );