1.
The SUM function returns the total sum of a column in a given selection. NULL values are not included in the calculation.
使用SUM函数可以返回给定的选择中列的所有记录值的累计合。NULL值不包括在内。
2.
Imputation of Null Values Based on Rough Sets Theory
基于粗集理论的Null值估算方法研究
3.
Range: 0 = default for all or even hex numbers 2 - 7e (or NULL) [Optional]
范围：0=缺省值为all或偶数的十六进制数2-7e（或NULL）[可选的]
4.
Range: -127 - 127 (or NULL) [Optional]
范围：-127-127（或NULL）[可选的]
5.
Range: a = amps (or NULL) [Optional]
范围：a=amps（或NULL）[可选的]
6.
Range: 0 - 16 (or NULL) [Optional]
范围：0-16（或NULL）[可选的]
7.
Range: 0 - 15 (or NULL) [Optional]
范围：0-15（或NULL）[可选的]
8.
Range: 1 - 222 (or NULL) [Optional]
范围：1-222（或NULL）[可选的]
9.
Range: 1 - 32767 (or NULL) [Optional]
范围：1-32767（或NULL）[可选的]
10.
Range: 1 - 127 (or NULL) [Optional]
范围：1-127（或NULL）[可选的]
11.
Range: a = amps, t = tdma, at = amps/tdma (or NULL) [Optional]
范围：a=amps，t=tdma，at=amps/tdma（或NULL）[可选的]
12.
Better Interbase blob, null and error handling.
更好的Intercase的blob,null和错误处理
13.
Range: 0 = primary 1 = secondary (or NULL) [Optional]
范围：0=主要的1=次要的（或NULL）[可选的]
14.
If OFDEL is set, the fill character is DEL; otherwise it is NULL.
如果设定了OFDEL，则填充字符是DEL，否则填充NULL。
15.
When Java sees null, it recognizes that the reference in question isn't pointing to an object.
一旦Java看到null，就知道该句柄并未指向一个对象。
16.
Fixed a crash bug in array_map() when NULL callback was passed in.
修正了在 array_map() 里面在回调是一个 NULL 时的缺陷
17.
Range: 0 = high priority, 1 = middle priority, 2 = lowest priority (or NULL) [Optional]
范围：0=高优先级1=中优先级2=低优先级（或NULL）[可选的]
18.
Range: y = yes, all responding faces, n = no, only strongest face (or NULL) [Optional]
范围：y=yes，所有的响应接口n=no，只有最强的响应接口（或nULL）[可选的]