Tag：Contrast
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Time：2020-4-5
A detailed explanation of the differences between Oracle date and timestamp 1. Date data type We are so familiar with this data type that we will think of date type when we need to represent date and time. It can store months, years, days, centuries, hours, minutes and seconds. It is typically used to indicate […]
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Time：2020-1-24
Both MySQL and mongodb are common open-source databases, but MySQL is a traditional relational database, mongodb is a non relational database, also known as a document database, which is a NoSQL database. They have their own advantages. The key is to see where they are used. So the well-known SQL statements are not applicable to […]
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Time：2019-12-11
Not to mention, the performance test results are directly given to: We compare the same hot products in the market and test the following products with the same environment and conditions: Goku, Kong, tyk. Note: the object of this pressure test is a single gateway node, and plug-in function is not enabled. Test details I. […]
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Time：2019-6-12
Copy codeThe code is as follows: #!/usr/bin/perlmy %scyjm; open (CONTACT,”f:\\perl\\f.txt”)||die(“can not open the file!”); while (<CONTACT>) { Next if /^#/; if ($= ~/^#/ abbreviation) chomp; [email protected] = split; # [email protected] = split/ s+/, $; abbreviation next if(($information[1]=~/\./) && ($information[2]=~/\./)); $scyjm{$information[13]}->{$information[0]}=$information[3]; } close CONTACT; open (SC,”f:\\perl\\a.csv”)||die(“can not open the file!”); while(<SC>) { chomp; […]
