Database Administrator

Mysql common time functions Reprinted please indicate the source: curtain roll west wind column (http://blog.csdn.net/ljxfblog) Recently, I have been playing the game back-end tool for some data statistics work. I have used a lot of mysql time

When synchronizing transactions and snapshots, the system prompts: When IDENTITY_INSERT is set to OFF, the displayed values cannot be inserted to the table. (Source: MSSQLServer; error code: 544 ), Cause: During SQL2008 synchronization to

About autonomous transactions and lock pragma AUTONOMOUS_TRANSACTION & LOCK and transaction transactions The previous problem can be reproduced stably. Oracle's INV provides an inv_lot_api_pub.auto_gen_lot () interface to automatically generate a

Vertica interrupt session, vertica session When using Vertica, you often encounter the need to forcibly end or interrupt a time-consuming query. In this case, you can use the INTERRUPT_STATEMENT () provided by Vertica () INTERRUPT_STATEMENT requires

Intent is called by the intent browser for telephone and browser calls. 1. Create an xml file and button Android: orientation = "vertical"Android: layout_width = "match_parent"Android: layout_height = "match_parent">Android: id = "@ +

Install MySQL in linux Since Oracle has acquired MySQL, the commercial version has also been transferred to the edelivery.oracle.com website. You can download the study by yourself, but you must first register an account for the Oracle website.   If

In Qt, the content in Qtableview is displayed on the corresponding control in real time. I have been studying Qt for a while. I need to display the data in Qtableview on the corresponding control for a few days. I want to watch it for a long time

Enable mysql remote connection in Linux and mysql in linux Procedure for enabling mysql remote connection in Linux.Mysql remote connection linuxserviceserveruserMysql by default, the root user can only access the local database, but cannot remotely

MySQL Log Management in Windows (similar to Linux) 1.1 and mysql1.1Why do I need to enable database logs? When multiple programs are using the database, our database sometimes fails. Why? No logs can be found, and the logs of each program cannot

Java program inserts garbled Chinese characters into DB data in linux, javadb First, the data inserted into the database is displayed as? When queried in Linux ??. Again, the result of connecting to db on windows is not garbled. Modify the

ORA-30009: connect by Operation memory insufficiency, ora-30009connect Today in the 11G environment manufacturing data encountered ORA-30009: connect by Operation memory is insufficient, 10g began to support XML, changed to xmltable can be. SQL>

Mysql binary log file error causes mysql service to fail to start. I opened phpmyadmin today and found that I couldn't connect to the mysql database. I couldn't restart mysql and found the following error when I checked the log. mysqld: File

When you use VS to connect to SQLServe, the System fails to load the file or the Assembly "System. Data. OracleClient, Version = 2.0.0.0, Culture = neutral, PublicKey, and cultureneutral Solution: Is to download two Microsoft SQL Server 2012 patch

Oracle locks the statistics of temporary tables and whether the hint and oraclehint can be dynamically collected after the lock The statistical information of the global temporary table cannot be collected. If it is collected, its statistical

Hive UDF implementation and HiveUDF implementation Hive's own Query Language HQL can complete most of the functions, but in special needs, you need to write your own UDF implementation. The following is a complete case. 1. Compile UDF in eclipse①

Oracle instr function, oracleinstrSyntax:Instr (fatherstr, sonstr [, start_position [, matchtimes])Fatherstr: parent string, which is used to locate the position of the substring.Sonstr: string to be searched in fatherstr.Start_position: the start

Big data backup and recovery application case-Using Partitioned Tables to back up and restore Data Big data backup and recovery application case-back up and restore data through a partitioned table Massive Data backup and recovery Solutions The

Oracle simple column-to-row, oracle column-to-row The requirement is to count the total salaries of different jobs in each department. SQL> select deptno, ename, job, sal from emp;DEPTNO ENAME JOB SAL---------------------------------------20 smith

Vertica converts Local time to GMT time, verticagmt When using Vertica databases, the program collects data from clusters in different time zones and writes it to the same table. Then we need to display the data according to the GMT time. In this

Oracle Instanc Client installation command tool, oracleinstancPrerequisites 1. Linux RHEL 6.X X86_64 Operating System 2. Oracle-related files (same OS) can be obtained from the server where the Oracle server is installed)Software Download Download