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Analyzing SQL statements in bulk using VTEXPLAIN
Introduction Prerequisites Overview 1. Gather the queries from your current MySQL database environment 2. Filter out specific queries 3. Populate fake values for your queries ... -
Analyzing SQL statements in bulk using VTEXPLAIN
Introduction Prerequisites Overview 1. Gather the queries from your current MySQL database environment 2. Filter out specific queries 3. Populate fake values for your queries ... -
Analyzing SQL statements in bulk
Introduction Prerequisites Overview 1. Gather the queries from your current MySQL database environment 2. Filter out specific queries 3. Populate fake values for your queries ... -
Hello world
Hello world Hello world Perl脚本是带有.pl 后缀的文本文件。 下面是helloworld.pl 的全部内容： use strict ; use warnings ; print "Hello world" ; Perl脚本由Perl解释器解释执行，perl 或者perl.exe ： per... -
Advanced Functions
"Advanced" functions context and wantarray .. and … Want to contribute? "Advanced" functions context and wantarray Perl has three contexts: void,scalar and list. ... -
Special Variables
Special Variables $_ $0 @ARGV @INC %ENV %SIG <> <DATA> and DATA $! $@ Want to contribute? Special Variables $_ $_ is the "it" variable.It's often the default par... -
高级函数
高级函数 上下文与 wantarray .. 和 … 高级函数 October 28, 2013 @ 04:12 PM 上下文与 wantarray Perl 有三种上下文：空、标量、以及列表。 func (); # void my $ret = func (); # scalar my ... -
模块和包
模块和包 模块 包 模块和包 在Perl中，模块（module）和包（package）是不同的东西。 模块 模块是你可以包含在另一个Perl文件（脚本或模块）中的一个.pm 文件，是与.pl Perl脚本语法完全相同的文本文件。一个示例模块文件可能位于C:\foo\bar\baz\Demo\StringUtils.pm 或者/foo/bar... -
特殊变量
特殊变量 $_ $0 @ARGV @INC %ENV %SIG <> <DATA> 和DATA $! $@ 特殊变量 October 28, 2013 @ 02:05 PM $_ $_ 是默认变量。它常用于内置函数的默认参数。 while ( <> ) { # Read a line into $... -
10.44. Version 3.5.4
10.44. Version 3.5.4 10.44. Version 3.5.4 Released April, 2001. 11.6 The system-wide mail directory is now /var/mail, no longer /var/spool/mail. Any packages accessing the ma...