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Recently, according to the company's plan, we need to incrementally fetch data from some tables in the previous SQL Server database to the ORACLE database, and decide to use the newly added CDC (Change Data Capture) function in sqlserver2008.

Full practices of mysql backup and recovery 1. Environment Settings between backup databases 1. Create Database test1, create table tt Insert the following data mysqlcreatedatabasetest1; QueryOK, 1rowaffected .. Full practices of mysql backup and

I. in many application systems, there are many operations that need to be processed by changing data tables. There are various processing logics for different situations such as addition, deletion, modification, and query. example: 1. mobile obtains

The hash index is implemented based on the hash table. It is only valid for queries of all columns that precisely match the index. For each row of data, the storage engine calculates a hash code for all index columns, calculate the rows with

Background query statement SELECTo. orders_id, s. orders_status_name, ot. text, af. affiliate_idFROMordersoLEFTJOINorders_totalotON (o. orders_idot.orders_id) LEFTJOINaffilia Background query statement SELECTo. orders_id, s. orders_status_name, ot.

SupplementalLog is a complementary type of log. It is mainly used for technologies such as logical Standby Database Synchronization, LogMiner, Streams, and Flashback. For logical Stand Supplemental Log is a complementary type of Log. It is mainly

This article translates MongoDBProductionNotes in MongoDBManuel. This section focuses on considerations that affect performance and reliability in the production environment, This article is to translate the MongoDB Production Notes section in

Create a collection command for MongoDB db. createCollection Create a collection command for MongoDB db. createCollection The complete command is as follows:Db. createCollection (name, {capped: , AutoIndexId: , Size: , Max

After upgrading MySQL from MySQL 5.1 to MySQL 5.6 in CentOS6.4 today, when using the NavicatPremium client management tool, I found that the smart prompt for writing SQL statements is not After upgrading MySQL from MySQL 5.1 to MySQL 5.6 in CentOS6.

When using mysqldump for backup, if the storage engine is MyISAM, you can only implement warm backup, and you need to use the option -- lock-all-tables to lock all tables. If the storage engine is Inno When using mysqldump for backup, if the storage

Query databases across multiple servers and multiple Oracle instances. For example, we need to check the value of the open_cursor parameter on all production environment databases so that we can consider Query databases across multiple servers and

Can I simulate mongouard to protect the database. We know that DataGuard can switch the database from the master database to the slave database in real time, or switch the database from the slave database to the master database to achieve seamless

Oracle concatenates values of different columns into a string-use the concatenation operator ldquo; | rdquo; or CONCAT ( Oracle concatenates values of different columns into a string-use the concatenation operator ldquo; | rdquo; or CONCAT (

What are the rare problems with installing Oracle11gXE in Configure in Ubuntu? Is Oracle 11g XE installed on Ubuntu a rare problem in Configure? I can only say that it seems that I have solved this Configure problem, but I still want to

The increment of the sequence of SCN does not change with any database operation, even the RESETLOGS. RESETLOGS clears redo records not applied in all online log files, RES The increment of the sequence of SCN does not change with any database

1. logon and exit command of RMAN: Method 1: $ rmannocatrman directly enters rman to back up data in non-catalog mode, or do not use nocatalogrman> connect 1. Run the following command to log on and exit RMAN: Method 1: $ rman nocatalog directly

When we have a large number of Redis or Memcached instances, we can only use some data distribution algorithms (such as consistent hashing) on the client side to implement Cluster Storage features. Although When we have a large number of Redis or

When using Oracle, I found that the use of single and double quotation marks is different. I checked some information online and summarized it myself: Double quotation marks: when an object is created, the object name, When using Oracle, I found

Oracle databases can achieve Incomplete recovery and full recovery of databases. Full recovery is to restore the database to the latest time, that is, lossless recovery, to ensure that the database is not lost Oracle databases can achieve Incomplete

Here we mainly compare the following three formats of cursor loops: 1. Single processing of open cursors; LOOPFETCH cursinto variables; EXITWHEN conditions; ENDLOOP; CLOSE game Here we mainly compare the following three formats of cursor loops: 1.