Oracle

It is a little strange to understand the ArcSDE index by using Oracle indexes. This article uses Oracle indexes as an example to rebuild a spatial index when it comes to the performance of ArcSDE, compared with the spatial index of ArcSDE for Oracle,

Full Import and Export of databases in oracle: cmd command line mode Import and Export of Oracle Data imp/exp is equivalent to oracle data restoration and backup. The exp command can export data from the remote database server to the local dmp file,

Oracle creates a view and opens permissions to users. To improve query efficiency, you can consider opening a view for users in other companies. www.2cto.com 1. create or replace view test_table_v as select t1, t2, t3, t4, t5 from test_table 2.

Oracle optimizer's RBO and CBO Methods ORACLE provides CBO and rbo SQL optimizer. CBO was introduced in ORACLE7, but it was only mature in ORACLE8i. ORACLE has clearly stated that in Versions later than ORACLE9i (ORACLE 10G), RBO will no longer

Modify the size of the oracle database SGA and PGA to modify the size of the SGA and PGASGA: Generally, 20% of the physical memory is used for the operating system reservation, and 80% of the other is used for the database. The SGA common database

TSPITR (Recovery of Tablespace Based on TIme points) TSPITR (Tablespace Point-In-TIme Recovery) Introduction to www.2cto.com TSPITR (Recovery of Tablespace TIme points) it is used to restore one or more tablespaces to a previous time point, while

Comparing the Simple Writing Method of cursor with official documents, it is very common to use cursor in storage, and traditional writing is troublesome. Summary: The format of www.2cto.com is as follows: [SQL] create or replace procedure ff as

The SELECT statement can be used for full-text search of the CLOB field. However, if you must use the dbms_lob.instr () function when using the WHERE clause, the command is as follows: www.2cto.com first creates a TEST table: SQL> create table TEST3

Clarify the relationship between Full Table scans and high levels and row prefetch (I) between Full Table scans and HWM www.2cto.com in Table Access Full, the database engine may not be ideal enough to scan all data blocks in the HWM table

Oracle renaming tables and operations on copying table information Java code oracle modifying table name alter table_name rename to new_table_name; www.2cto.com oracle Inserting Data Based on queries Insert is a common statement in T-SQL, insert

The ORACLE String concatenation aggregate function can be used for group by 1. create type strcat_type www.2cto.com -- the essence of defining a type aggregate function is an object create or replace type strcat_type as object (cat_string varchar2 (4

Introducing from the hard drive installation of OracleLinux6.3: This blog post focuses not only on installing OracleLinux6.3, but also on a small error that has plagued me for several days. www.2cto.com scene: A blank hard disk, a tool U disk, disk

ORACLE stores the executed SQL statements in the shared buffer pool, which can be shared by all database users. When you execute an SQL statement (sometimes called a cursor), if it is exactly the same as the previously executed statement,ORACLE can

Oracle fragmentation key points-Multi-table joint query, collect basic database information 1. multi-table join query for oracle: www.2cto.com select. sname, B. stu_xb from student a, studentinf B where. stu_id = B. stu_id syntax 2. SQLStructur

Record local and remote oracle backup in linuxClient server environment: rhel-server-5.4-x86_64 + oracle10g remote backup server environment: windows server 2008 network environment: formal server on the internet, remote backup server on the

Oracle RAC migration OCR (10g) Oracle RAC addition and deletion OCR reference: http://www.bkjia.com/database/201303/197136.html Oracle RAC backup and recovery OCR reference: http://www.bkjia.com/database/201303/196370.html If you want to change an

ORA-00600: internal error code, arguments: [13013] ORA-00600: internal error code, arguments: [13013] when resolving shutdown immediate. Error occurs and the solution is as follows: SQL> shutdown immediateORA-00600: internal error code, arguments: [1

Oracle AWR threshold affects the historical execution plan. Some netizens recently mentioned why the historical execution plan of SQL statements cannot be viewed in dba_hist_ SQL _plan. This problem is caused by default, the threshold value set by

Knowledge about volume El locks 1. view which session locks: SQL statement: select 'alter system kill session ''' | sid | ',' | serial # | '''; 'From v $ session where sid in (select sid from v $ lock where block = 1); SQL> select 'alter system kill

Oracle Function Synthesis small example date operation premise there is a student table student contains a birthday field (Date Field) let you find a student over 10 years old. Here, we only use the year to judge the difference between the birthday