Database Administrator

Solution for RMAN-00600 [13200] On dataguard, use rman to connect to the catalog Database for backup. When backing up, The rman log reports the following error:Starting backup at 2014/04/23-10:02:02 Archived

Redis uses Persistence for data migration Preface Redis is an open-source high-performance Key-Value Pair database. It provides a variety of key-value data types to meet the storage needs in different scenarios, and uses many high-level interfaces

Oracle substr function usage, oraclesubstr Function Oracle substr function usageObtain the string substr (string, start_position, [length]) with the specified start position and length in the string.For example:Substr ('this is a test ',6,2) Wocould

NoSQL data model (1) nosqlBackground The previous blog has introduced the overall data model. The following describes the four data models in NoSQL. For example:The concept key-value database is a simple hash table, which is mainly used when all

Mysql is similar to the over Grouping Implementation of oracle. Today, when someone asks a question, the requirement is probably like this. Id S Start Time End Time 1 20 08:10:20 08:10:40 1

Linq --- I'll explain the order for you. Your beauty is not only a query statement, but also a write by using This is a group of extensions for the c # and Visual Basic languages. It allows you to write C # Or Visual Basic code to query memory data

Oracleing table to timesten In oracle, oracletimesten ---- 1. Run the createandloadfromoraquery command and enable six threads. Command> createandloadfromoraquery scott. t1 6 select * from scott. t1;   ---- 2. Use built-in commands to import

Mysql SQL statement (1), mysqlexplain Reference: http://www.2cto.com/database/201307/230048.html Http://blog.csdn.net/zhuxineli/article/details/14455029 Explain is used to analyze how mysql uses indexes to process select statements and connect

Modify the Data Type of the column corresponding to the primary key of the Oracle database table. When upgrading our product from SPC100 to SPC200, because the data type of the database table column has changed, you need to write an SQL script to

Usage of selectByExample () in Mybatis: Use userID to query the record list. on the internet, selectByExample () is rarely used in Mybatis. The following is my usage: Public class ViewTeam {@ Autowiredprivate TeammemberMapper teammemberMpper; @

If the oracle client is not installed, use plsql to connect to oracle and oracleplsql.1.1. Download the Instant Client Official Website: Http://www.oracle.com/technetwork/cn/database/features/instant-client/index-092699-zhs.html Download the

MySQL COUNT, group by, and mysqlcount Group by is used to group the results, which facilitates statistics After grouping, so there will always be count followed See the following table for example: Group by ID, count the number of times each ID

Oracle string operation, oracle string Select upper ('testmyname') from dual; -- convert to uppercase Select lower ('testmyname') from dual; -- convert to lowercase Select upper (substr ('testmyname'), 5) from dual; -- intercept myname and

JavaEE transaction, javaee1. What is a transaction? A Transaction is a series of operations performed as a single logical unit of work. These operations are submitted to the system as a whole, either executed or not executed. A transaction is an

Oracle connection query and oracle connection I have learned inner join and outer join in SQL Server. outer join is divided into left outer join andRight outer join ). In Oracle, the external connection between two or more tables is represented by (+

The reason why the oracle task process is not executed after it is submitted is /* Run the following command in SQL * Plus */-- check steps when the task is not running -- 1. check whether the instance session is RESTRICTED by select instance_name,

Ora-12514 tns listeners cannot identify the Service requested in the connection descriptor, ora-12514tns Today, when you remotely connect to a linux server, this error occurs: tnsnames. ora and listener. ora file configuration is not wrong, but is

Oracle Performance Optimization Operation 16: Using partition indexes, oracle Performance Optimization When you use analysis commands to analyze partition indexes, the range of data values of each partition is stored in the Oracle Data dictionary.

Highlights of mysql usage and mysql usage 1. Environment: windows, MySQL Server 5.5, Navicat forMySQL 2. Mysql common SQL statements SQL classification: DDL-Data Definition Language (CREATE, ALTER, DROP, DECLARE) DML-data manipulation language

Oracle EBS R12.2 create a custom module, ebsr12.2 The following steps describe how to register a custom module in EBS R12.2. Refer to Oracle support Creating a CustomApplication in Oracle E-Business Suite Release 12.2 (Document ID 1577707.1)   1.