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Recently, if you want to make a big move in production, you need to restore the backup of the production library to another machine every day for testing. So thought of using the way of DUPLIDATE, simple and convenient, early configuration of the directory, and then a command can restore the library. So I wrote a recovery script and passed the test.
Initialization parameter file:-PFILE:Static parameter file,PFILE-SPFILE:Persistent server parameter file,SPFILEPFILE-- ini
What is cdh? CDH is Cloudera's 100% open source Hadoop distribution, built specifically to meet enterpris
Redis introduction: redis is currently one of the more popular NOSQL systems, it is a key-value storage system. Similar to Memcached, but largely compensates for the shortcomings of memcached, which supports relatively more value types of storage
Environment preparation: system: centos 7 required packages: lamp environment (httpd, PHP, php-mysql, mariadb-server), discuz] # yum install-y httpd php p
Query the current db:1 select database () 2 status 3 show tablesCREATE USER 'pig'@'%' IDENTIFIED BY'; use mysqlcre
DISTINCTDISTINCT repeats data for the entire result set, not for each column, so the following statement does not leave only Fdepartment for duplicate value processing: SELECT DISTINCT FDepartme
Oracle has been using it for some time to create users, assign permissions, and import initial data, so take the time today to sort out the SQL statements used in this process. Step1: log in to sqlplusC:\ Users\ Administrator > s using the DBA user
It is necessary to open the service when using the database. I would like to introduce several ways to turn on the service. I will show you all of these in the form of picture and text in three open ways. For friends who can't open the service, you can learn. These prerequisites are that your computer has installed SQL database, otherwise the database cannot be used.
Mongodb provides two commands to back up (mongodump) and restore (mongorestore) data. The format of the data dump is BSON's 1.mongodump backup usage: bin/mongodump [op
-- 1. Create a user group mysql, create a user mysql and add it to the user group mysql, and grant read and write access to groupadd mysql-- create a mysql user group useradd-r-g mysql mysql
Error display: C:\ Users\ Administrator > sqlplus / as sysdbaSQL*Plus: Release 11.2.0.1.0 Production on Wednesday April 24
11.2.0.4 Database. Remote backup database using expdp+dblink reports errors as follows: ORA-31679: Table data object "HIS". "AQULED_COM_SQL" has long
-- = Oracle ADG operation and maintenance =-- = test log transfer = 1. On primary, view the last archived log and force log cutting
Select tabschema,tabname,tabspace,numrow,tabsize (size in bytes), CREATED,LAST_DDL_TIME,tabtype- (1 for normal table, 2
Mysql multiple table deletion while deleting a student's basic information, delete all the student's scores mysql > select * from stu_inf;+----+-
Yesterday's Mid-Autumn Festival was supposed to be a good day for reunion. I had to be on duty for the bitter operation and maintenance staff (, complain). I thought there would be nothing wrong. Who knew that a more important Oracle server suddenly called the police, and the two core of CPU soared to 100%. Load average is also better than that.
Windows server 2008 R2 RAC environment, which installed oracle version 11.2.0.1, and then upgraded to oracle version 11.2.0.4. Restart the computer and found that the database could not be started. The analysis steps are as follows: 1 enter cm
Starting with oracle 12.1.0.2, index can be compressed through COMPRESS ADVANCED LOW when creating an index, create index index_name on table_name (
RESET MASTER can be used to clear the execution history of GTID. If you want to add a node that has performed local transactions to the Group Replication, you need to execute the RESET MASTER. Executive RESET MASTER meeting
What are the differences between the storage engines commonly used in MySQL?
This article is to share with you about how common storage engines in MySQL differ from each other. The editor thought it was very practical, so I shared it with you as a reference. Let's follow the editor and have a look. The four storage engines commonly used in MySQL are: MyISAM storage
2022-06-01 03:50:57Details
The strongest snail has unlimited resources to buy the cracked version so that you can play continuously.
The strongest snail unlimited resources in-house cracked version is a very popular leisure adventure nurturance mobile game recently. The painting style of the game is very strange, with a lot of interesting copy content challenges, players are like watching the story while playing the game, very interesting. In the game, you will change.
2022-06-01 04:48:35Details
The extraction time of bid evaluation experts, how long in advance is appropriate?
Article 22 of the http://www.zhaobiao.cn/ measures for the Administration of experts on Evaluation of Government Procurement (hereinafter referred to as the measures) stipulates that "in principle, the time for the selection of evaluation experts shall be half a day or one day before the bid opening, and shall not exceed two days under special circumstances.
2022-06-01 06:18:08Details
What are the differences in the implementation of delete table operation in MySQL
This article is to share with you about the differences in the implementation of table deletion in MySQL. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look. This paper mainly talks about three operations of deleting tables in mysql, delete statement and tru.
2022-05-31 23:37:44Details
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