sql优化——explain 利用explain可以得到sql的执行计划,是查询性能优化不可缺少的一部分。 explain得到的列明解释: id: 用来标识select语句的,id越大越先执行。 select_type: table: 对应正在访问的哪一个表,表名或者别名。 有一些临时表生成,这些临时表是没有任何索引的。 type: type显示的是访问类型,是...SQL...
Intel has more money than any of these server companies and all the other server companies were gonna do it. Itanium, of course was a massive dud. This was something completely predictable, as the last time they tried to innovate away from their antiquated 8086 architecture, the 32-bitiAPX ...
com.apple.iokit.IOSCSIArchitectureModelFamily 2.6.5 com.apple.iokit.IOFireWireFamily 4.2.6 com.apple.iokit.IONetworkingFamily 1.9 com.apple.iokit.IOAHCIFamily 2.0.4 com.apple.iokit.IOUSBUserClient 4.0.0 com.apple.iokit.IOATAFamily 2.5.1 com.apple.iokit.IOUSBFamily 4.0.2 com.apple....
Undefined symbols for architecture arm64: "_vDSP_ctoz", referenced from: _aubio_fft_do_complex in aubio(fft.c.1.o) "_vDSP_fft_zrip", referenced from: _aubio_fft_do_complex in aubio(fft.c.1.o) "_vDSP_minv", referenced from: _fvec_min in aubio(mathutils.c.1.o) "_vDSP_create...