New Features of MongoDB 3.0

New Features of MongoDB 3.0 In March 3, MongoDB3.0 was finally released. The main features include support for the previously acquired WiredTiger storage engine, plug-in storage engine API, SCRAM-SHA-1 authentication mechanism, and improved

MySQL fuzzy query: LIKE and REGEXP Modes

MySQL fuzzy query: LIKE and REGEXP Modes MySQL fuzzy query provides two modes: LIKE mode and REGEXP mode.LIKE Mode The LIKE mode uses the LIKE or not like comparison operator to perform fuzzy queries. SELECT field FROM table WHERE field LIKE [not

Detailed steps and precautions for building a single instance DG for two Oracle 11g nodes RAC

Detailed steps and precautions for building a single instance DG for two Oracle 11g nodes RAC Environment Introduction: OS: [root @ java3 ~] # Uname- Linux java3 2.6.18-308. el5 #1 SMP Tue Feb 21 20:06:06 EST 2012 x86_64 x86_64 x86_64

MongoDB Study Notes (1)-install MongoDB on Windows

MongoDB Study Notes (1)-install MongoDB on WindowsOverview This document describes how to install MongoDB in Windows. Official website of MongoDB: http://www.mongodb.org/. the latest version is 2.6.7. Note: MongoDB does not support Windows XP since

How to forget the MySQL root Password in Windows

How to forget the MySQL root Password in Windows 1. Open the MySQL configuration file my. ini and add skip-grant-tables to the end of the file or add it to the [mysqld. 2. Restart the MYSQL service. In windows:Net stop MySQLNet start MySQL If an

Goodbye to MongoDB, hello PostgreSQL

Goodbye to MongoDB, hello PostgreSQL Olery was founded almost five years ago. It started with the single product (Olery Reputation) developed by Ruby proxy. Over time, we began to work on a series of different products and applications. Today, our

Oracle tablespace recovery

Oracle tablespace recovery If the test. dbf data file of test in a tablespace is deleted by mistake, and the database cannot be opened the next time you restart the database ),Always reports an error: SQL> alter database open;Alter database open

Oracle ADG Heartbeat failed to connect to standby fault case

Oracle ADG Heartbeat failed to connect to standby fault case The customer's primary Database is a standalone Database of Oracle Database 11gR2 for AIX. The ibm hacmp software is deployed at the system level, the database is made into a master-slave

Adding not null constraints to Oracle

Adding not null constraints to Oracle When creating a table, Oracle adds the not null constraint to the column in the following format:Column_name data_type[Constraint constraint_name] not nullConstraint constraint_name indicates the name specified

OGG-01496 OGG-01031 troubleshooting

OGG-01496 OGG-01031 troubleshooting The pump process reports the following error: 01:20:49 ERROR OGG-01496 Oracle GoldenGate Capture for Oracle, ext2.prm:./dirdat/sa000000, at RBA 2295. The tail file does not exist on the target end. It may be

Solutions to RMAN connection to secondary database ORA-04031

Solutions to RMAN connection to secondary database ORA-04031 An error occurred while connecting to the secondary instance when Oracle 10 Gb built dg to use rman to copy the database. The error message is as follows:[Oracle @ oracle11g admin] $ rman

ORA-00904 scn_to_timestamp

ORA-00904 scn_to_timestamp In Oracle, the scn and time can be converted to each other, and the friend's database is 10.2.0.5. Previously, it was normal to convert the scn to the corresponding time through scn_to_timestamp, but an error was reported

Unique and index in Oracle 10 GB

Unique and index in Oracle 10 GB Unique and index in Oracle 10 GB Create table test ( X integer, Y integer, Z integer ); Alter table test add constraint primary key (x); -- generates a constraint and an index of the same name. Create unique index

Triggers in Oracle databases

Triggers in Oracle databases A trigger is a special stored procedure that is automatically triggered by the Oracle system when a database event occurs. Triggers are usually used to enhance database integrity constraints and business rules. For

Introduction to the Oracle temp table

Introduction to the Oracle temp table [Preface] Today, the developer encountered a problem where data could not be found in the temp table. After learning a little bit about it, I feel that there are still many knowledge points, so I will sort them

Oracle 11g two nodes RAC build a single instance DG Process Problems and Solutions

Oracle 11g two nodes RAC build a single instance DG Process Problems and Solutions I used to build a single-instance database of DG, and it was quite simple. Later I came to the company's first project to build a DG for RAC. I was confident that I

How does MySQL track SQL statements?

How does MySQL track SQL statements? In project development, it is inevitable that you need to track SQL Execution statements on the database server. By tracking SQL Execution statements, we can determine that When Upper-layer applications are

Create and modify temporary tablespace of Oralce

Create and modify temporary tablespace of Oralce A temporary tablespace is a disk space used to store the temporary data generated when you execute the order by lamp statement for sorting or summarizing. By default, all users use temp as the default

Relationship between Oracle database view and base table

Relationship between Oracle database view and base table I. What is a view first? A view is actually a query SQL statement used to display relevant data in one or more tables or other views. A view uses the results of a query as a table. Therefore,

Oracle standalone environment enables automatic database startup upon startup

Oracle standalone environment enables automatic database startup upon startup In both Windows and Unix environments, Oracle databases can be automatically started. In Windows: The experiment method is relatively simple. It can be implemented by

Total Pages: 1013 1 .... 236 237 238 239 240 .... 1013 Go to: GO

Alibaba Cloud 10 Year Anniversary

With You, We are Shaping a Digital World, 2009-2019

Learn more >

Apsara Conference 2019

The Rise of Data Intelligence, September 25th - 27th, Hangzhou, China

Learn more >

Alibaba Cloud Free Trial

Learn and experience the power of Alibaba Cloud with a free trial worth $300-1200 USD

Learn more >

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.