Oracle

1. Check the system version number SCN according to the time point: Select timestamp_to_scn (to_timestamp ('2017-01-07 11:20:00 ', 'yyyy-MM-DD hh: MI: ss') from dual 2. Check whether the data at the SCN time point of the table to be deleted is to

More than 400 tables in the Test Database need to be cleared repeatedly for testing. I can only use one entry in PL/SQLTruncate Table1;Truncate Table2;Truncate table3;Truncate table4;......Only one execution can be selected at a time. If multiple

Solution:1. Modify the listener file.... Oracle directory/ora9/Network/admin/listener. oraChange the host =... name of your computer ~2. Modify the service name file.... Oracle directory/ora9/Network/admin/tnsnames. oraIn the same way, modify the

After using dbca to create a database, create a table. Before creating a table, create a table, and then create a user to use the table space as the user's default table space, finally, log on to the user and create a table. By default, the table

1. Process in block:   However, PL/SQL code can only process data up to 32 KB. If this limit is exceeded, PL/SQL cannot be used for processing. SQL> SET SERVEROUT ON SQL> BEGIN2 for I IN (SELECT * FROM T_LONG) LOOP3 if instr (I. LONG_COL, 'World'

After so many days, we have finally been able to make things easier. The oracle-driven QOCI of qt is finally compiled today. The connection is successful !!! Qt cial only comes with SQLLite and ODBC drivers. oracle drivers must be compiled by

Store a Java object list in the BLOB type of Oracle Write method in DAO implementation: Public void saveDsPPPs (Long dataFileId, ArrayList list) { try { ByteArrayOutputStream bo = new ByteArrayOutputStream (); ObjectOutputStream oo = new

Linux system boot oracle Auto-start (method 1) --- load as service auto-start, stop1. dbstart and dbstop The Oracle database automatically starts and stops the dbstart and dbshut files provided by Oracle (in 7.3.3.0.0 ). These files can be used only

(The following content takes effect only when "=" is used, but not if "LIKE" is used .) Sometimes we do not want to use lower or upper functions to query all case-sensitive content, such as data transferred from sqlserver and mysqlOracle. You can

Problem description: Oracle installed in Linux by a colleague, the default character set is not modified. we8iso8859p1 is used and Chinese characters are not supported, The problem is that the Chinese data entered by the client can be displayed.

When Oracle Database 11g is installed on a 64-bit Windows 7 system, the following message is displayed: "file e not found: \ app \ Administrator \ product \ 11.2.0 \ dbhome_1 \ owb \ external \ oc4j_applications \ applications \ wfmlrsvcapp. ear ",

The following section describes the syntax that can be used to alter xml db configuration information from within SQL * Plus. ensure that you are logged into the database from a DBA account. in the following example, the default HTTP/WebDAV and FTP

Open the VM and go to the system. Choose "device"> "Install enhancement" from the menu. After the installation is complete, select device-allocate data space. In the pop-up window, click the plus sign in the upper right corner. In the pop-up window,

-Oracle databases are heavyweight, and their management is very complicated. Sort out the steps for starting and disabling Oracle databases on the linux platform.After installing oracle, you must create an oracle system user,Add several environment

Document directory I. Preparations before the start 2. Delphi uses BDE to access the Oracle database 3. Add and maintain Oracle ODBC Data sources 4. Use Delphi to develop and manage Oracle database instances Use Delphi to access the Oracle

When we rebuild an index without the online option, oracle directly reads the data of the original index. When we add the online option, oracle directly scans the data in the table, so how to maintain the consistency of the index segment data? It is

The two associated update write methods and alternative methods of oralce are very different from those of ms SQL. Sometimes it takes 5 to 10 hours to update a large table.   UPDATE T_BASE_SUCC_PROUSER x set x. F _ EXPECTENDDATE = (SELECTE.F _

Use RMAN> show all;The following shows the RMAN configuration parameters: Configure retention policy to redundancy 1; # defaultConfigure backup optimization off; # defaultConfigure Default device type to disk; # defaultConfigure controlfile

 Clustering factor We often discuss when to use indexes and when to use a full table: what we may say is the most data size needed and the proportion of the data in the table. Some people say that the index is less than 20%, some people say that

Small differences between Oracle and SQLServer Selection Oracle and Microsoft are two major database products in the history of database development. This leaves little room for selection of databases, either Microsoft or Oracle. However, there is a