Programming VIP

1, environment CentOS 6.4 Preface: CentOS 6.4 system comes with version 2.6.6 of Python 2. Download files Pthon: https://www.python.org/downloads/　　　　 Version: python-2.7.3 setuptools: https://pypi.python.org/pypi/setuptools#downloads　　 Version: setuptools-0.6c11 pip official website: https://pypi.python.org/pypi/pip#downloads ...

Preface 1. Create tables containing primary partition and subpartition 2. Creating Partition Local Index 3. Insert data 4. View the execution plan (here is the explanation of the execution plan) 5. Create a non-partitioned table with the same field data in the partitioned table above and create an index 6. Look at the exec ...

Digression Let's start with what file systems are and what tools are needed. file system Nowadays, there are many kinds of storage and complex stacks. But the user's direct interface is still file system . For Linux and the open source community, a lot of software is also dependent. file system . MySQL and PostgreSQL databases, for example, c ...

``` Description: When setting up PHP environment, the source installation method failed, and the last yum cloud used was successfully installed (see another log for details), followed by a more detailed source installation method, which was first reloaded and recorded for later learning. ``` Install Configuration apache Gen ...

Installing MySQL under CentOS 7 Step 1: Download MySQL [root@tencent-centos1 opt]# wget http://mirrors.sohu.com/mysql/MySQL-5.7/mysql-5.7.17-linux-glibc2.5-x86_64.tar.gz Step 2: Unzip and download to MySQL package 1. Decompression package. Command template The directory where the tar-zxvf compression package i ...

Why query for table joins? Query employee information with department name SALES How do I join queries to tables? Two ways: Sql 1992 and sql1999 sql1992sql classificationCartesian product (table multiplier)2. Use'='for the join condition of the equivalence join table3. Join conditions for non-equal join tables use'>, >=, <, <=,! ...

Oracle database client has an sqlplus component that allows us to perform some database operations on the command line. In order to improve the efficiency of dump file writing, we try to use sqlplus command to generate dump file. sqlplus can specify running scripts, such as: sqlplus admin/pwd@//127.0.0.1:1526/orcl@./tmp_sql/N ...

In order to facilitate learning and testing, all the examples are built under Oracle's own user Scott. Note: The red order by in the title indicates that order by must be taken when using this method.1. rank ()/ dense_rank () over (partition by... Order by...) Now customers have such a need to query the information of t ...

Oracle Kernel Technology Disclosure_Lv Haibo's Learning Notes When Cache Buffers Chain(CBC) Latch is competing, there are two main situations: 1. Multiple incompatible processes apply for the same CBC Latch to access different Buffer Headers (BH) of different chain lists protected by this CBC Latch, which is called hot chain c ...