Comparison between MySQL create table as and create table like
In MySQL databases, there are multiple ways to clone tables. For example, you can use create table... or create table. However, there are still some differences between the two methods.
Oracle RMAN backup and Restoration
RMAN supports Incremental Backup: databases, tablespaces, and data files.
Only used blocks can be backed up as backup set
Ing between tablespaces and data files: dba_data_files/v $ datafile_header
In noarchivelog
Output MySQL logs to syslog In the chroot environment
I have been learning nodejs and angularjs over the past few months. I am still working on front-end development. I will share some experiences later.
One problem we encountered in the past two
Oracle reconstruction Enterprise Manager
1. First create a listener[Root @ primary ~] # Xhost +Access control disabled, clients can connect from any host[Root @ primary ~] # Su-Oracle[Oracle @ primary ~] $ Netca
Annotation: The LISTENER name
Oracle undo complexity-oracle Core Technology Reading Notes 4, undo-oracle
I. Overview
Undo stores old data. For example, if you modify A record to change abc of column A to def, abc is saved in undo. There are two purposes: 1. if your transaction
[MongoDB] The Regex Expression query of MongoDB, mongodbregex
In the past two blogs, the topic mainly focus on the high query operation of mongodb. in this blog, we simply study the regex expression in the mongdb. mongoDB also support the regex
WAS cluster series (16): WAS cluster deletes the summary file, cluster Summary
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Original Works are from the blog of "Deep Blue blog". You are welcome to
Should varchar or datetime be used for the field type of date stored in the database ?, Varchardatetime
Background:
Some time ago, I saw an article "how to show your (lover) name in the lower right corner of my computer" in Baidu experience. I have
Use tdm to compile the 64-bit qt mysql driver, tdmqt
The official website only provides the 32-bit qt version compiled by mingw. After testing, the mysql driver can be directly installed and transactions can be executed.However, if I use the 64-bit
Oracle queries the first 10 records and paging queries (5th to 10th records), and oracle queries the first 10 records
If you want to know the actual application solutions of the first 10 records in Oracle query, you can click the following article
Use the earlier version of Xtrabackup to restore the full backup file created by the later version of Xtrabackup.Recently, we want to restore the data of multiple MySQL servers backed up by xtrabackup to another MySQL Server and start multiple
Microsoft SQL server, Error 2, SQL server
When I started learning about databases in my sophomore year, I installed the database at the beginning. As a result, the first lab class of the database taught us how to install the database on our own
By re-generating the execution plan, the execution plan deviation of Bound variables will be solved, resulting in the SQL Execution time being too long. The execution plan SQLSome SQL statements in the 11G environment of the Basic Elements (time,
SQL statement of one of the IT Ninja Turtles-connecting all values of the same field, Ninja Turtles SQL
Oracle can use SYS_CONNECT_BY_PATH string to aggregate functions: select ltrim (MAX (SYS_CONNECT_BY_PATH (productname, ','), ',') AS
Use sqlprofile to optimize slow SQL statements in goldengate and SQL statements
In HP unix, a process is monitored to occupy a high cpu. Later, it was found that the statement execution plan in gg had a problem, resulting in a high cpu. Since the
Expanded group by for report development and expanded group by for reports
In practical use, for example, in a data warehouse, multi-dimensional analysis of data is often required, not only the results of standard grouping (equivalent
Group by), you
SQL server Service startup failed, SQL SERVER startup failed
I haven't used SQL server for a long time. I started SQL today and found that the Service failed to start. The error is as follows:......Error 1069-(unable to start the service due to
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