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sql: update the YEAR type and syntax element #870

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Sep 10, 2018
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sql: update the YEAR type and syntax element #870

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6 changes: 3 additions & 3 deletions sql/datatype.md
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Expand Up @@ -63,7 +63,7 @@ BIGINT[(M)] [UNSIGNED] [ZEROFILL]

| 语法元素 | 说明 |
| ---- | --------|
| M | 类型长度，可选的 |
| M | 类型显示宽度，可选 |
| UNSIGNED | 无符号数，如果不加这个标识，则为有符号数 |
| ZEROFILL | 补零标识，如果有这个标识，TiDB 会自动给类型增加 UNSIGNED 标识，但是没有做补零的操作 |

Expand Down Expand Up @@ -174,8 +174,8 @@ TIME[(fsp)]
> 时间。范围是`-838:59:59.000000`到`838:59:59.000000`。以`HH:MM:SS[.fraction]`格式显示 TIME 值。
fsp 参数是表示秒精度，取值范围为：0-6。默认值取 0。

YEAR[(2|4)]
> 两位或四位格式的年。默认是四位格式。在四位格式中，允许的值是 1901 到 2155 和 0000。在两位格式中，允许的值是 70 到 69，表示从 1970 年到 2069 年。
YEAR[(4)]
> 四位格式的年。允许的值是 1901 到 2155 和 0000。
```

## 字符串类型
Expand Down