Oracle

*This is a bit disgusting, but I didn't take this step well. The problems that come up later are several times more disgusting. *I am not sure if all of the following RPM packages are required, but it is better to install a few more than one

Reply to the deleted data by mistake. 1. Execute alter table table_name enable row movement; 2. Execute flashback table table_name to timestamp to_timestamp ('2017-05-24 14:59:36 ', 'yyyy-mm-dd hh24: MI: ss '); Query historical operation data.

Oracle grouping Oracle analysis functions are very powerful. We only need to master these methods. A more direct saying is that knowing the functions of these analysis functions can accomplish a lot of work. The following describes these

Purpose: return the specified data column values of multiple records in a data table at intervals of commas. Select decode (v_value_type, '01', wm_concat (order_code ),'02', wm_concat (to_char (order_date, 'yyyy-mm-dd ')),'03', wm_concat (TRIM

Oracle's solution is to_date () and 24-hour notation and the display of MM minutes: 1. When Oracle's to_date function is used for date conversion, many Program Like me, the engineer may intuitively convert the format "yyyy-mm-dd hh: mm: SS", but it

How to Use % Type and % rowtype in Oracle PL/SQL1. Use % TypeIn many cases, PL/SQL variables can be used to store data in database tables. In this case, the variable should have the same type as the table column. For example, if the first_name

  Oracle series: ref cursor   In the Oracle series: cursor (see:Http://blog.csdn.net/qfs_v/archive/2008/05/06/2404794.aspx)Think about it: How to pass a cursor as a parameter? To solve this problem, you need to use ref cursor.   1. What is

ArticleDirectory 1. Preparations 1. Preparations Assume that if you are using a Linux system, the Oracle user name is Oracle. At the same time, you operate on the Oracle server. In Windows, click Start, click Run, Enter cmd, and

I always thought that the following statement (Execution 1) is an implicit cursor, which is not much slower than the explicit definition cursor (execution 2. For the sake of convenience and simplicity, I usually use the method of executing one to

This solution has a good effect in actual problem handling. It only uses some of the measures in the solution and has improved the performance by several hundred times. In particular, the stored procedure of submitting 1.3 million rows of data into

ASP. NET calls the Oracle Stored Procedure for fast Paging Original post: http://dev.csdn.net/article/82/82808.shtm For more information about accessing the stored procedure of Oracle 9i using ADO. net, see the following section.Article)Http://www.

Yesterday, SQL Server 2005 was used to import data tables directly to Oracle. This feature is also good for sqserver2005, but when I useProgramThe problem arises when connecting to the Oracle database, prompting that the table name cannot be found.

Yesterday I just transferred the database from sqlserver to Oracle, and today when the use of the problem, the insertion of data is no problem, the problem is in the update, the prompt: ORA-01036: Invalid variable name/Number The answers to this

Connection character: | Value assignment :": = "E. g.: l_name: = ' Sky ' ; Determine whether the values are equal :" = "Example: If 1 = 1 Then ... Variable binding: ":" such: If : P_name = ' Sky ' Then ... Exists? Not

1,UseDbms_flashbackRetrieve Data  You must first useDbms_flashbackPackage power, can be inSysLower Pass Grant execute on dbms_flashback to user;Authorization   SQL> execute dbms_flashback.enable_at_time (date );//Enable snapshot Mode SQL>In

Database links in Oracle can be used for cross-database queries, but problems often occur during use, often failing to test inexplicably. In fact, pay attention to the following issues to avoid many such problems. 1. It is best to set the link to

To_date format Day: Dd number 12 Dy abbreviated Fri Day spelled out Friday Ddspth spelled out, ordinal twelfth Month: MM number 03 Mon abbreviated MAR Month spelled out March Year: YY two digits 98 Yyyy four digits 1998 The time range in the

This storage process is not written by me, but it is very easy to use. It is especially suitable for the cross that shows full screen for the newly imported object. Create or replace procedure "user". "recompile_schema" isV_type

Oracle 11g:Oracle Database 11g Release 1 (11.1.0.6.0) downloadHttp://www.oracle.com/technology/software/products/database/index.htmlDocument: http://www.oracle.com/technology/global/cn/documentation/index.htmlOracle

Which of the following conditions is used for where comparison? : Equal to: =, , >=, <> Including: In, not in exists, not exists Range: between... and, not between... and Matching Test: Like, not like Null test: Is null, is not null Boolean links: