Database Administrator

In PL/SQL, how does one insert a data entry every several seconds? In compiling Oracle PL/SQL, if you need to pause the execution for a few seconds and continue the execution, you can use dbms_lock.sleep built in Oracle. However, you must install

Details about Reference Partition in Oracle 11g Data Partition is a solution for Big Data Objects proposed by Oracle in the early days. After the evolution of several versions, Partition is still a popular and widely used technical strategy with a

ORA-600 [kcbz_check_objd_typ] Error Handling Basic ElementsChannel feedback, HIS software in the data storage, prompt ORA-600 error, the specific error information is as follows: [Microsoft] [ODBC driver forOracle] [Oracle] ORA-20999: ORA-00600:

Show table status like 'table' \ G details, tablestatusMysql> show table status like 'leyangjun' \ G* *************************** 1. row ***************************Name: leyangjun table NameEngine: MyISAM Table Storage EngineVersion: Version

Full backup, differential backup, and Incremental backup for Databases Data backup methods include full backup, differential backup, and Incremental backup. What are the differences between the three backup methods? What should I do in specific

Mysql Database Error solution: mysql database ERROR 1046 (3D000): No database selected Error Description: no database is selected ---- Cause: the corresponding database is not opened (operations on creating tables and tables must be performed

Memcached memory allocation mechanism and memcached Allocation Mechanism In C, when malloc is used to allocate memory, memory fragments are generated, that is, idle and fragmented space cannot be used. The Slab Allocator mechanism in Memcached

SQLServer generation time range; sqlserver generation rangeI wrote a similar article earlier, which is used in development. If OBJECT_ID (n'tf _ Data_TimeRange ', n'fn') is not nullddrop function tf_Data_TimeRangegocreate function tf_Data_TimeRange (

Oracle --- use PL/SQL Developer to connect to Oracle12C (64-bit), oracle --- oracle12cOracle --- connect Oracle12C (64-bit) version with PL/SQL Developer1. Install Oracle 12c 64-bit2. Install a 32-bit Oracle client (instantclient-basic-nt-12.1.0.1.0)

Set STATISTICS_LEVEL = BASIC to disable database features. statisticslevel SetSTATISTICS_LEVEL=BASICWill disable the features of oracle Automatic Workload Repository (AWR) Snapshots Automatic Database Diagnostic Monitor (ADDM) All

Do not do this during database update, and do not use database update. Preface: Do not do this during database update. What is this? Please come with me. Earlier in the year, the customer sent the text "XX, XXXXXXXX has a 0.1 million account not

Expdp background view, expdp background Today, after executing the data import command expdp, we found that there was less than one parameter. Press CTRL + C. Who can perform this operation only on the surface of cancel? In fact, the background is

ORA-12541: TNS: no listeners, ora-12541tnsAfter I reinstall Oracle yesterday, ORA-12541: TNS: no listening program error occurs when I connect oracle with PL/SQL Developer, for example: With the help of Brother Wang Peng, I found that the oracle

Use of STDistance and difference between geometry and geography, stdistancegeometry 1. First, let's talk about the difference between geometry and geography in SQL Server: Geometry: Planar plane coordinate system [supported by SQL Server conforms to

Obtains whether all columns in the database and whether the column type is null, whether the default value is a primary key, and whether the default value of the database is Read the summary of the stored procedures of SQL Server SELECT DISTINCT

Question 4: MySQL ---------- Rank Scores, scoresof Write a SQL query to rank scores. if there is a tie between two scores, both shoshould have the same ranking. note that after a tie, the next ranking number shocould be the next consecutive integer

[Oracle11g auto-increment primary key], oracle11g primary key Oracle Auto-incrementing primary keys must be implemented using sequences and triggers. First, we create a table where the primary key is int to implement

Manual and automatic start of multiple oracle instances and multiple oracle instancesStart two instances manuallySu-oracleLsnrctl start-- Assume that one instance is itsm and the other is test.Export ORACLE_SID = itsmSqlplus/as

Oracle pl/SQL practice, oraclepl I have read oracle pl/SQL practices over the past few days. In order to study the performance of SQL statements, I will first study the impact of cursors on code.1. Row-by-row Processing The program declares a

General Solution for database connection failure Today, we have built a development environment. The development environment consists of two machines. My old notebook A is now used as A server dedicated to database servers. Another machine, B, is