Oracle

In an organization, it is often necessary to query all sub-classes under a department or all parent classes of a department. The recursive method is as follows: 1. query the subclass set SelectA.*FromOrganizations a startWithID=

I have encountered Oracle backup and restoration problems recently. I have always done some repetitive work. Do you have a permanent solution? Nothing can be done, just unexpected. Previously, we used scripts to perform backup and restoration, that

If the table already exists. Http://www.itpub.net/thread-345521-1-1.html -------------------------------------------------- I just want to import a table in the backup file During the operation, all data in the table array is accidentally

Connect resource permission; Grant connect, resource to user; Subsequent User Permissions: Connect role: -- is the most basic and typical right granted to end users. Alter session -- modify a session Create Cluster -- create a cluster

An SM project is used as an example. 1. log on to sqlplus sys/system as sysdba as an administrator; 2. query the current user's access session, select Sid, serial # from V $ session where username = 'vgsm '; 3. Delete the currently occupied

How to unlock an oracle user lock (ORA-28000: the account is locked:When using Oracle databases, users are often locked. Take Scott as an example. solution:Step 1: Log On As an administrator: sqlplus sys/system as sysdba;Step 2: After Successful

1. Account LogonC: \> sqlplus "sys/love2you as sysdba" C: \> sqlplus/nologSQL> connect sys/love2you as sysdba 2. Start and close the instance ● SQL> startupStart the instance, open the control file, and open the data file ● SQL> startup

System. notsupportedexception: UnsupportedOracle Data Type userdefined encountered It turns out that the table structure of the Oracle database called by Web Service contains the Oracle Spatial Field, so it cannot be returned correctly. Solution:

Simple case example For each customer in the sampleOe. MERsTable, the following statement lists the credit limit as "low" if it equals $100, "high" if it equals $5000, and "medium" if it equals anything else. Select distinct, Case credit_limit

There are too many uncertainties in the path we are going to take. The admonishing of others, a flash of our own, and occasional gains and losses are all changing our fate. The world is unpredictable, and there is no need to hold things too long. No

. Net Developer CenterHttp://www.oracle.com/technology/global/cn/tech/dotnet/index.htmlOracle data provider for. netHttp://www.oracle.com/technology/global/cn/tech/windows/odpnet/index.htmlOracle Developer Tools for Visual Studio.

Create or replace trigger t_after_table -- create or replace trigger nameAfter insert --- time after/before event insert or update or deleteOn student --- role table on tablenameFor each row -- specifies whether to execute a trigger for each

In ArcGIS, data is stored in Oracle using SDE, including binary long raw, ESRI st_geometry, and Oracle Spatial-based sdo_geometry. The advantages and disadvantages of these methods are not the main research direction. We can get help through

The most basic idea of operating blob with JDBC is to insert a record containing an empty blob, and then immediately open the record in the row lock mode to obtain reference to the Blob field, get an output stream from it, write the byte [] data,

1. Random return records   Select * from (select ename, job from EMP order by dbms_random.value () where rownum   2. Sort null values Select * from EMP order by comm DESC nulls last; null values rank first Select * from EMP order by comm DESC

Scott users are locked by default, and they can be unlocked first to log on to the land. Use the following statement to unlock SCOTT: JavaCode Alter user Scott account unlock; Alter user Scott account unlock; This password may be

If the Oracle 10g is installed in the virtual machine, the server instance cannot be started after each restart. You must enter sqlplus to manually start up. The solution is as follows: 1. compile a batch processing file oraclestart. BAT, the

If data in one table needs to be updated using another table, it is updated when it exists. If it does not exist, it is inserted. The merge command is provided after Oracle10g. You can use this statement to complete related operations. Syntax:

This is a brief note and only serves as a memo.   Keywords: Hongqi asianux3 + Oracle 10g R2 for Linux x86-64   1. Receive a consulting phone number in the morning: Oracle cannot be started in Linux. We will try to solve the problem at the

1. the default system password is manager. 2. The default sys password is change_on_install. Find the sqlplus program in \ oracle \ product \ 9.2 \ bin in the installed database directory and run:./sqlplus system/manager @ ora9i Use the system