Database Administrator

Stored Procedure and trigger application, stored procedure trigger I. Tutorial Purpose 1. Master the methods and steps for creating a stored procedure; 2. Learn how to use stored procedures; 3. Master the methods and steps for creating a

Mysql DATA Export Permission There are many ways to export mysql data, such as mysqldump, mysql-e 'SQL'> file, which can easily export data. However, when using a common user to export data, an error occurred. 1 Select * into outfile

List the factorial methods implemented by PostgreSQL.PostgreSQL has a huge number of features and there are many ways to implement multiplication. Today I will briefly list the following convenient ways. For example, we want to calculate 10! 1. You

Summary of methods for detecting ORACLE data block corruption, and oracle Summary 1: Use initialization parameters You can use the initialization parameter db_block_checksum \ db_block_checking to set the database's physical consistency and logical

Oracle Check Constraints Oracle | PL/SQL Check constraints usage1. The target instance explains how to use the CHECK constraint (create, enable, disable, and delete) in Oracle. 2. What is the Check constraint? The CHECK constraint adds additional

Qt implements a small supermarket cash register system and qt supermarket As a contact, I plan to use Qt to develop a small cash register system. From the initial conception to the implementation of basic functions, after some time, many times other

Functions supported by partition in mysql5.1, 5.5, and 5.6: mysql5.1partition Partition functions supported by mysql5.1 ABS() CEILING()(See CEILING () and FLOOR ()) DAY() DAYOFMONTH() DAYOFWEEK() DAYOFYEAR(

Big Data Analysis: Using Hunk and hadoopmapreduce in combination with Hadoop or Elastic MapReduce Jonathan Allen, author Hunk is a new product of Splunk. It is used to test and visualize Hadoop and other NoSQL data storage. Its new version will

Oracle 11g new feature system partition table, oracle11g A new feature in 11g is the Partition Table of the system. Here is an experiment: SQL> select * from v $ version;BANNER--------------------------------------------------------------------------

10061 events, 10061When the database is started, close it directly and view the alarm log: Errors in file /opt/oracle/diag/rdbms/orcl11g/orcl11g/trace/orcl11g_mmon_3749.trc (incident=65276):ORA-00600: internal error code, arguments: [4194], [0x00000

Mysql advanced cursor, mysql cursor What is a cursor? The select statement may obtain n statements at a time, so the cursor can obtain a record in the select statement at a time. Move down every time one is obtained! Complicated logic can be

Oracle trigger failed Routine checks on the AWR Report of the database. An update statement is executed multiple times for over 30 seconds each time. This SQL statement is very simple, that is, modifying data based on primary key conditions, the

Path Problem in mysql5.5 and in mysql5.5 The parameters in my. ini are as follows: Basedir = "C:/Program Files/MySQL Server 6.0 /" Datadir = "" path for storing the table structure Innodb_data_home_dir = "" This is the path for storing table

Function syntax comparison between the computing report and the rundry report. In addition to the core functions of V4.x, integrated computing report 5.0 is optimized and streamlined, and the report function is also properly optimized, here, we will

Mysql advanced triggers and mysql triggers A trigger is a special type of transaction that can monitor certain data operations (insert/update/delete) and trigger related operations (insert/update/delete ). Check the following events: Complete the

Examples of sqoop and sqoop Description: sqoop is a tool that can import data from ORACLE and MYSQL to HDFS, HIVE, and HBASE (or vice versa. The following are some examples. Leave a reference: # Extracting data from Mysql to HDFS. Problem: too many

SQL commands and SQL statements 1. View sqllite version information: 2. Create a database 3. Exit sqlite command line: Sqlite>. quit or sqlite>. exit command 4. List the configurations of the current display format 5. display the database

Introduction to Neo4j database, neo4j Database As the world's advanced graph database, Neo4j has become the first choice for many Internet companies. Neo4j is an open source graph database developed based on java and also a NoSQL database. While

[Mysql] imports an Excel table to one of Mysql tables, mysqlexcel Assume that the table contains three columns: A (integer field), B (integer field), and C (string data, the fields to be inserted in the table are col1, col2, col3 1. In any column,

Multi-Data Source deadlock in C3P0, Recently, the data migration tool is almost completed. Today, the connection pool is changed to C3P0, and a problem is found, A deadlock occurs when C3P0 of multiple data sources is configured to obtain