Database Administrator

Use mysqlbinlog to extract binary logs The MySQL binlog log records all changes to the current database since the MySQL database is enabled. Binlog logs are binary files. We can extract binary logs to generate readable SQL statements to reconstruct

Oracle Default Role Oracle System permissions are based on three dimensions: System Privilege, Object Privilege, and Role Privilege ). System permissions define certain behavior operations that can be performed by users. object permissions define

Use Oracle rownum to make the table sort Field Values continuous Use Oracle rownum to make the table sort Field Values continuous 1. Requirements The fields in the table (eval_index) are as follows: Table Field Description Description

Implementation of standalone database in Redis 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 array is a RedisDb structure, and each redisDb structure

Redis 2.8.18 installation error Solution Redis 2.8.18 Installation Error Zmalloc. h: 50: 31: error: jemalloc/jemalloc. h: No such file or directoryZmalloc. h: 55: 2: error: # error "Newer version of jemalloc required"Make [1]: *** [adlist. o] Error 1

SQL server date functions: [LocalTimeToUTC], [UtcToLocalTime], ConverToMidnight, and sqlserver Functions In the definition of AX 2012 table, the default value of the datetime type is utc microsecond, and the value of date in the previous procedure

A nhibbench BUG, NHibernateBUGI. background In our current project, we use nhib.pdf to implement the data access layer. When accessing data, some database tables are identified: there are clear table names and field names. In this case, you can

[Oracle] export ledba11 drop the lost member from the database and then add a new mem ber to the group, oracledatabase In your database, online redo log files are multiplexed and one of Members in a group is lost due to media failure? How wocould

Common SQL statements and SQL statements 1. query the database table structure Select (case when. colorder = 1 then d. name else null end) [Table name],. colorder [serial number],. name [field name], (case when columnproperty (. id,. name,

Use 10046 to view the execution plan and read the trace file, 10046 traceThere are many ways to view the SQL Execution Plan. 10046 events are one of them. different from other SQL Execution plans, when we encounter complicated SQL statements, we can

[Oracle] export ledba9 Rename the read-only data file to their correct file names., invalid lerename One of the tablespace is read-only in your database. The los s of all Control file forced you to recreate the control file. Which operation do You

Mysql timestamp valid range, mysql range Things From_unixtime/unix_timestamp overflow, unavailable Cause The number of seconds since returned by from_unixtime is the result of int type, and the valid range of int Is [-2 ^ 31 + 1, 2 ^

[EBS] Chinese patch6678700 error note, The following error is reported when an EBS12.1.1 patch is installed in patch6678700: ATTENTION: All workers either have failed or are waiting: FAILED: file XLIFFLoader. class on worker ....ATTENTION: Please

MySQL InnoDB Storage engine lock, mysqlinnodbConcept:A lock is used to manage concurrent access to shared files. Innodb locks the database at the row level. However, the innodb Storage engine uses locks in multiple places inside the database to

Professional Competence requirements for GoldenGate O & M personnel Since GoldenGate is a software running on the database, this nature determines that GoldenGate is very similar to application software (such as applications in various industries,

[Oracle] export ledba3 create a sorted hash cluster to store the data, export ledba3sorted You are designing an application for Certkiller. com and you have Been asked to design a database table to facilitate monthly bill gen Eration. The bill

Installing mysql: warning: rpmts_HdrFromFdno: Header V3 DSA signature: NOKEY, how to install dsa[Root @ localhost yum. repos. d] # rpm-e -- nodeps mysqlError: package mysql is not installed[Root @ localhost yum. repos. d] # rpm-qa | grep mysql[Root @

[Oracle] export ledba5 A mapping table must have been created., export ledba5mapping While designing your database, you have created the EMPLOYEES tab Le as an index-organized (IOT). You want to create a bitmap index on The JOD_ID column to make

Mysql High Performance Memcached (2), mysqlmemcachedThis article describes the problems that need to be paid attention to when deploying Memcached and the distributed algorithm of Memcached.Whether you are a new system or a system that has been

Mongodb substitutes tokumx and mongodbtokumx On the way to NOSQL, not only mongodb is worth noting I recently tested a mongodb from TokuMx. Calculate it as a derivative product! People familiar with Msql may be familiar with this company! First,