Database Administrator

Oracle Database provides several data backup methods, but the most commonly used is logical Backup Using exp. Physical backup (including online backup and offline backup) is not used much. The main reason is that the physical backup process is

MySQL TIMESTAMP (TIMESTAMP) details, mysqltimestamp When creating a table, if a field type in the table is TIMESTAMP, the default statement for generating this field is: CREATE TABLE `test` ( `id` int(11) DEFAULT NULL, `ctime` timestamp NOT NULL

Step 1 of kettle's User Defined Java Class, kettledefinedZookeeper Step 1 of User Defined Java Class)   The "user-defined java class" step in kettle, also known as the UDJC step, is available in version 4.0 and has powerful functions and is

Installing Oracle Block Browser and Editor tool (bbed), installingbbedBBED is an internal ORACLE tool. Generally, BBED is used to restore faulty databases, for example, if the data file header is inconsistent due to power failure or abnormal

The student table sid, sname, and student table cid, cname, and student transcript table sid, cid, and cscore. The name of the course with the highest score required for the student, snamecscore -- 1. Table creation SQL: -- Student table: --

Data room charging system checkout BUG, charging system checkoutDisclaimer: the following content only applies to those who put the card table and the return table in the same table!Recently, we have started to rebuild the charging system of the VB.

Use stored procedures and stored proceduresWhat is a stored procedure is simply a set of one or more MySQL statements for future use. It can be considered as a batch file, although their role is not limited to batch processing. Like defining a

ORA-00942: Table or view does not have a low-level error example, ora-00942 example ORA-00942: a low-level error does not exist in a table or view   Run the query statement and report a ORA-00942 Error   After checking, the user who does not

Oracle batch export AWR reports, oracle export awr Work requirement: in the project, all the AWR reports in the production database must be dumped and imported to the database for testing convenience. The AWR report in the test database needs to be

Mysql remote connection is acceptable. Local Connection reports an error. mysql local connection Use the MySQLdb library of python to connect to the local mysql database. The error is as follows: File "/usr/lib/python2.7/dist-packages/MySQLdb/_

Since MySQL was acquired by Oracle, PostgreSQL has gradually become the first choice for Open Source relational databases.This article introduces the installation and basic usage of PostgreSQL for the first time users. The following content is based

Part 1 Database SQL language Begin and end in database scripts   In database scripts, begin and end are a strange word. Without them, some code looks confusing; adding them makes the structure of the Code instantly clearer. Indeed, begin and end are

Neo4jIt was said thatEmbeddedInPythonInGraph databaseModule, allowing Python to operate local files through graph database APIs to store graph structure data (similar to many libraries that support SQLite ). Today, Neo4j finally fulfilled its

I checked the various versions of DB2. It is said that DB2 10 has come out and I don't know what the situation is, but it will definitely improve some functions, this article is my summary of the latest DB2 9.7 database version planning: DB2 Express-

1. Introduction SQLite is an open-source embedded Relational Database Engine for SQL database with self-contained, zero configuration, and transaction support. It is highly portable, easy to use, compact, efficient, and reliable. Unlike other

Index category: Indexes can be divided into clustered indexes, non-clustered indexes, and unique indexes. Advantages: 1. The main advantage is convenient query and improved system performance. 2. By creating a unique index, You can ensure the

MySQL query cache settings improve MySQL query performance and cache mysql First, let's take a look at the MSYQL logical framework: The image comes from high-performance mysql   If QueryCache is used, the server will retrieve the results from

MySQL-11-stored procedure, mysql Stored Procedure Stored Procedure The commonly used operating database language SQL statements must be compiled and then executed before execution. The Stored Procedure (Stored Procedure) is a set of SQL statements

SQL Server setup media does not support the language of the OS or does not have ENU localized files., setupfilesWhen you click setup.exe to install sqlserver2008of win7 64, SQL Server setup media does not support the language of the OS or does not

Solve the Problem of connecting 64-bit Oracle with PLSQL, and connecting 64-bit oracle with plsql Since most of the current laptops are 64-bit Windows 7 systems, PLSQL_Developer does not have 64-bit, which causes us to connect. Here we will teach