查询词典 optimizer

This is one of the optimization that opcode optimized like Zend's PHP optimizer.

这是最劣化处置的一类，反如Zend的PHP优化器所做的这样。

If NULLs were not indexed, then the optimizer could only use indexes on columns with NOT NULL constraints.

如果觉得效率太慢，可以适当增加块的读取数和查询的并行度来加快全表扫描的速度。

It then enables the query optimizer to generate a well-tuned plan.

此时查询优化器就可以使用 SQL 档案来生成执行计划了。

A sliding mode based optimizer and traction control system which is used for a traction control system of in wheel driven EV is developed in this paper.

改进了用于轮式驱动电动车牵引控制中最优滑移率辨识的滑模变结构优化器，设计了基于滑模变结构的牵引控制系统。

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最新消息：2008年的一项研究显示，那些经常神经紧张的人士服用了磷脂酰丝氨酸后，以脑电波衡量的数据显示出精神受压力的程度大为放松。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。