Database Administrator

Generate tree encoding using Oracle stored procedures Requirement Field Description Remarks ID Primary Key, 32-bit UUID   TYPE_CODE Encoding Example: 1-01-003 PARENT_ID Parent node ID, 32-bit

Buffer sort and oraclebuffer in Oracle execution plan The buffer sort in the Oracle execution plan is not actually sorted. It only loads data to the memory and does not scan tables multiple times. -- Manufacturing data Drop table test purge;Drop

[Oracle] Release ledba26 RMAN recovers up to log sequence 230, but not including 230., export ledba26rman Our database operates in ARCHIVELOGmode. The redo log files are Not multiplexed and one of the online redo logs is missing. The missi Ng redo

[Oracle] revoke ledba23 change the backup retention policy to retain the backups for a sma roller period o, reinstallbackups An RMAN backup job fails, displaying the following error: ORA-19809: limit exceeded for recovery files Your analysis shows

Topic model, modelHttp://blog.csdn.net/pipisorry/article/details/42129099 Step 1: install gensim Step 2: configure a and Vector Spaces Convert a document represented by a string to a document vector represented by an id: Documents = ["Human machine

[Oracle] uses the rman blockrecover command and ledba21rman You work as a database administrator at Certkiller. com. Your database is open and running in ARCHIVELOG mode. You take RMAN full backups every Sunday night. On Monday morning, while

SQL comprehension, SQLSelect B .*,B. model_ent_name + cast (m. year as varchar) as modelname,M. index_value as valInto # tbFrom(Select a. *, erm. model_ent_nameFrom(Select w. uuid, w. indexdef_id,I. index_name, I. index_def,Case when w. years = 2014

Mysql-timed call of stored procedures, mysql-stored procedures Mysql regularly calls the stored procedure to back up the table structure. Stored Procedure instance: CREATE PROCEDURE backUpSms()BEGINDECLARE tname varchar(64);set @tname = CONCAT('sms_

Sqlplus component damage recovery test, sqlplus component testSqlplus component accidentally damaged and restoredAfter executing the sqlplus/as sysdba command, there is no response, which is a bit strange...[Oracle @ lixora bin] # sqlplus/as

Powershell batch processing template and powershell Batch Processing Common. ps1 cls; #Global is public#Script is internal#Script is Script#Local is current stack level#Numbered scopes are from 0..N where each step is up to stack level (and 0 is

Backup _ use word to write and export multi-Table statements and word statements Original Works are from the blog of "Deep Blue blog". You are welcome to reprint them. Please note the following source when reprinting them. Otherwise, you will be

Redis --- installation in Linux environment, redis --- linux environment Finally, I have time to sort out my notes .... I. Introduction REMoteDICtionarySErver (Redis) is a key-value storage system. Similar to Memcached, Memcached supports more

Mysql character encoding settings Inserting Data in mysql always displays ??? Garbled text. Many people on the Internet said that the trial was not correct. After a large amount of query information, they wrote the Solution Below. Different

[Oracle] When ledba12 When a new log group is added, it wocould have one member in each disk group., Too ledba12added You are using an Automatic Storage Management (ASM) instance to m Anage the files of your production database. You have two disk

The Cause and solution of the full transaction log in SQL Server Error Description: The transaction log of the database is full. To find out why the space in the log cannot be reused, see the log_reuse_wait_desc column in sys. databases. First,

[Oracle] oracledba8 NOLOGGING, oraclenologging You noticed that the index tablespace in your database requires Recovery. However, instead of discovery a media recovery, you decide D to re-create the indexes in a new tablespace. Which two options wou

[Oracle] oracledba7 SQL Access Advisor, oracledba7advisor You find that the execution time of reports in your datawarehouse Application is significantly high. You suspect the lack of indexes Be the reason for the degradation in performance. Which

Implementation of Redis standalone database, redis Standalone Database Standalone Database implementation Principle The Redis server saves all databases in the db array of the redis. h/redisServer structure in the server status. Each item in the db

Huge pages Series 4, hugepages Series From RedHat 6, OEL 6, SLES 11 and UEK2 kernels, Transparent HugePages is enabled by default to improve memory management. The performance transparency page (Transparent HugePages) of is similar to that of the

EntityFramework delayed Loading Delayed loading: load (read) only when we need to use it)   When we want to view the order information, we want to use delayed loading to display the detailed records of the corresponding order. This not only