MySQL online tutorial - Column Types part 2

MySQL online tutorial – Column Types part 2

MySQL Text data type

Text can be fixed length (char) or variable length strings. Also, text comparisons can be case sensitive or insensitive depending on the type you choose.

CHAR(x): where x can range from 1 to 255.
VARCHAR(x): x ranges from 1 – 255
TINYTEXT: small text, case insensitive
TEXT: slightly longer text, case insensitive
MEDIUMTEXT: medium size text, case insensitive
LONGTEXT: really long text, case insensitive
TINYBLOB: Blob means a Binary Large OBject. You should use blobs for case sensitive searches.
BLOB: slightly larger blob, case sensitive.
MEDIUMBLOB: medium sized blobs, case sensitive.
LONGBLOB: really huge blobs, case sensitive.
ENUM: Enumeration data type have fixed values and the column can take only one value from the given set. The values are placed in parenthesis following ENUM declaration. An example, is the marital status column we encountered in employee_per table.
```
m_status ENUM("Y", "N")
```
Thus, m_status column will take only Y or N as values. If you specify any other value with the INSERT statement, MYSQL will not return an error, it just inserts a NULLvalue in the column.
SET: An extension of ENUM. Values are fixed and placed after the SET declaration; however, SET columns can take multiple values from the values provided. Consider a column with the SET data type as
```
hobbies SET ("Reading", "Surfing", "Trekking", "Computing")
```
You can have 0 or all the four values in the column.
```
INSERT tablename (hobbies) values ("Surfing", "Computing");
```