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In ORACLE, we can locate a database object through file_id (file#) and block_id (block#). For example, if we have file#=4 block#=266 blocks=8 in the trace file generated in 10046, then I can locate the object through the following two SQL s   SQL 1: This SQL is inefficient and takes a long time to execute.   SELECT OWNER,        SEGMENT_NA ...

Original text: Partnership and Status Table Author: Bane Radulovic Translator: Qiu Dalong, an expert in the technology of Warbury Science and Technology Database, is mainly involved in the implementation, testing, maintenance and optimization of the company's products. In-depth research on SQL optimization, data migration, backup disaster r ...

Reference: http://www.cnblogs.com/skywang12345/p/java_threads_category.html outline Atomic Integer Array, Atomic Long Array and Atomic Reference Array are three types of arrays with similar principles and usages. This chapter introduces atomic classes of array type with Atomic Long Array. The contents include:Introduction to Atomic L ...

Case Description Out of curiosity and better answers to other people's questions - "How many TPS can oracle support?" The following tests were carried out. Two, problems How much is the performance difference between Oracle's high concurrent Insert transaction partition table and regular table? Three, design 3.1 Data Design Desi ...

The Oracle database is used in the project, so backup and restore are needed locally (there is no database shared on the LAN). For example, there is now a backup file of student.dmp database. Install and configure Oracle 11g XE brief introduction The following is from Oracle Database Express Version 11g Version 2 OTN Licensing Protocol: Any u ...

0x00 - Introduction to Environment VMware version: VMware 12pro Host operating system: RHEL6.5_64 Shared Storage Creates Shared Disk Files Using VMWARE Database version: Oracle 11gR2 11.2.0.4.0_RAC Oracle database files are deployed on ASM disk groups and need to complete storage migration without downtime or as short as possible. Because it is ...

case Case study: Laravel attaches the top 10 comments to his list of articles? At the same time, the first 10 comments of each article are queried together when getting the list of articles. This is a typical case of partition query, which needs to be partitioned according to the post_id field in the comments table, and sorted according to the ...

For Oracle database upgrade operation, the upgrade steps are similar between each version. First, Oracle software is upgraded, and then the data dictionary tables in the database are upgraded. In Oracle 12c, when we integrate databases through containers, the upgrade mode becomes more flexible. After integration, I can choose ...

Reference: http://www.cnblogs.com/skywang12345/p/java_threads_category.html   outline Atomic IntegerField Updater, Atomic LongField Updater and Atomic Reference Field Updater are similar in principle and usage in modifying atomic types of members of classes. This chapter introduces the basic types of atoms. The contents include:Intr ...

1,DUAL table 2,ROWID type 2.1,Using ROWID to Query Data 2.2,Updating data with ROWID 3,NULL value 3.1,NULL and empty strings 3.2,NULL and Functions 3.3,NULL and Index 3.4,NULL and SQL 4,summary 1, DUAL table DUAL is a virtual table in Oracle, which is used to form the grammatical rules of SELECT. Oracle system guarantees that t ...