This article talks about the data types of mysql database. If you don’t understand the data types of mysql database or are interested in the data types of mysql database, then we will Get up and read this article. Okay, let’s stop talking nonsense and get to the point
| Data type | Storage range | Bytes | |||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TINYINT | Signed values: -128 to 127 (-) Unsigned values: 0 to 255 (0 to ) |
1 | |||||||||||||||||||||||||||||||||||||||||||||
| SMALLINT | Signed values: -32768 to 32767 (-) Unsigned value: 0 to 65535 (0 to #-1) |
2 | |||||||||||||||||||||||||||||||||||||||||||||
| Signed values: -8388608 to 8388607 (- |
) None Signed value: 0 to 16777215 (0 to ) | 3||||||||||||||||||||||||||||||||||||||||||||||
| Signed value: - | Unsigned value: 0 -1 | 4||||||||||||||||||||||||||||||||||||||||||||||
| Signed value: - | Unsigned values: 0
## to -18 |
| Precision | |||
|---|---|---|---|
| 6-7 decimal places (commonly used) | |||
| 14-15 decimal places |
| Date type | Storage space (bytes) | Date format | Range |
|---|---|---|---|
| datetime | 8 | YYYY-MM-DD HH:MM:SS | 1000-01-01 00:00:00 ~ 9999-12-31 23:59:59 |
| timestamp | 4 | YYYY-MM-DD HH:MM:SS | 1970-01-01 00:00:01 ~ 2038 |
| date | 3 | YYYY-MM-DD | 1000-01-01 ~ 9999-12-31 |
| year | 1 | YYYY | 1901~2155 |
| time | 2 | HH:MM:SS | -838:59:59 ~ 838:59:59 |
| Column type | Description |
|---|---|
| CHAR(M ) | M bytes, 0<=M<=255, fixed length |
| L+1 bytes , where L | |
| L+1 bytes, where L< | |
| L+2 bytes, where L< | |
| L+3 bytes, where L< | ##LONGTEXT |
| ENUM('value1','value2') | Enumeration, 1 or 2 bytes, depending on the number of enumerations (up to -1 value) |
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