Oracle

Because of hardware failure, you decided to drop a redo log membEr from the database.Which condition should is met to drop a redo log file?A. The redo log file should belong to an active group.B. The redo log file should belong to an inactive

Chapter Eighth Data processing1. Data Manipulation languageDML (data manipulation language–) can be executed under the following conditions:Inserting data into a tableModifying existing dataDelete existing dataA transaction is made up of DML

You find, the execution time of reports in your DatawarehouseApplication is significantly high. You suspect the lack of indexes toBeing the reason for the degradation in performance. which advisory CompOnent would you refer to, in order to determine

A lock is a mechanism that prevents data from being interactively corrupted when two transactions operate on the same data source (table or row). Oracle uses blocking technology to ensure the serialization of concurrent operations. Oracle's locks

The data in the table does not actually delete the data after it has been deleted, but instead it hits a delete tag that can be recovered only if it has not been overwritten. The experimental steps are as follows:[Email protected]>create table

Reprinted from Http://blog.sina.com.cn/s/blog_53e731b70101liku.htmlOracle startup, prompting "lrm-00109:could not open parameter file"Lrm-00109:could not open parameter file '/home/oracle/oracle10g/dbs/initomsToday when connecting to the Oracle

Because of recent projects, to use Microsoft's EF framework without the Oracle client installed, access to the Oracle database. The following code will be called when the error.System.Data.Common.DbProviderFactories.GetFactory

1. Error: libpthread.so.0:Cannot open Shared object fileTwo files need to be modified:Vi/usr/oracle/product/10.2.0/crs_1/bin/srvctlVi/usr/oracle/product/10.2.0/crs_1/bin/vipcaAt the bottom of the setup Ld_assume_kernelAdd a row unset

1. View, close, and start the listener1) Use the Lsnrctl command with the status parameter to see if the listener is starting to work$lsnrctl status2) using the LSNRCTL command with the stop parameter, you can shut down the database listener and

Recently learning Oracle, want to improve the efficiency and legibility of the written statement, today's note is about the subquery factor words such a thingA factorial query may not necessarily improve efficiency, but it can improve the

First, memory adjustmentOracle 11g, Oracle unified the SGA with the PGA, the sum of the Memory_target parameter settings, that is, Max (SGA+PGA) Alter system set sga_max_size=1500m Scope=spfile;If the error is set to Sga_max_size>=memory_target (not

An error message was encountered when deleting files in bulk on the AIX platform:Ksh:/usr/bin/rm:0403-027 The parameter list is too longReason:This occurs mainly because the AIX kernel parameter Ncargs control, the command line cache has the

Duplicate data can have two cases, the first: only some fields in the table, the second: Two rows of records are identical.First, the deletion of duplicate data for partial fieldsLet's start by talking about how to query for duplicate data.The

Create or replace procedure GETYC isv_id VARCHAR2 (36);V_date VARCHAR2 (4);BeginDeclareBeginFor I in (selectC.xqbmFrom t_bas_gcjbxx Cwhere C.id in (select a.IDFrom T_bas_gcjbxx Awhere A.SCSZBG = 1MinusSelect B.gcidFrom T_bas_szrbjcxx bwhere To_char (

Explore Oracle's database upgrade five PSU11.2.0.4.3 rollback 11.2.0.4.0First, enter the PSU directory, execute opatch rollback[[email protected]~]# su-oracle[[email protected]~]$ lsc18522509 Desktop opatch p18522509_112040_ Linux-x86-64.zip p6880880

In the Oracle relational database, let's take a look at the following question:A transaction: Select from T where ID > Ten and ID B Transaction: Update T Set id = 45000 WHERE id = 4501Two transactions are performed in the following order:A

A tragedy caused by the dramatic increase in HugePagesORACLEsession not enabled Fault description: HugePages is not enabled in LINUX, the host memory is nearly 300 GB, And the SWAP is 32 GB. The SGA_MAX_SIZE setting of ORACLE is about 80% of the

Oracle-some SQL statements required for report Creation Oracle SQL for report It was freezing, and I stayed at home and read "Mastering Oracle SQL" 2nd. I found that Oracle is still very powerful, and there are two hundred optical functions. It is

PLSQL _ basic series 7_insertion method: initial Ting/Unconditional/Conditional ALL/Conditional first insert, plsql1_ting BaoXinjian I. Summary Multiple Oracle Insert Methods 1. standard insert 1. inserting ting Insert 2. unconditional insert 3.

PLSQL _ basic Series 1 _ Regular Expression REGEXP_LIKE/SUBSTR/INSTR/REPLACE, plsqlregexp_like 2014-11-30 BaoXinjian I. Summary There are four functions that support regular expressions in ORACLE: 1 REGEXP_LIKE: similar to LIKE 2 REGEXP_INSTR: