Oracle

Oracle odp.net cannot connect to oracle. If you happen to be using a 64-bit operating system (such as win2008 r2), the development tool is also the most advanced vs.net 2010 sp1, however, when the Code fails to connect to oracle, it always reports

How to Use the sqlldr command in oracle (using the sqlldr tool (batch import data) sqlldr can import large amounts of data in the text to the oracle database table www.2cto.com in win7, I tried it myself and shared it with you. 1. create a simple

"The Oracle client and network components are not found. These components are .. "solution" and Oracle client and network components are not found. These components are provided by Oracle and part of Oracle 7.3.3 (or higher) customer software

To add the split and splitstr functions to Oracle, there are many requirements for batch operations in recent projects. The client transmits a set of IDS separated by commas to the database, and the stored procedure needs to split them, then process

Cause Analysis of ORACLE's inability to use indexes first, determine the optimization mode in which the database runs. The corresponding parameter is optimizer_mode. Run "show parameter optimizer_mode" in svrmgrl to view the information. Since

First, remember how many records in the deleted table select count (*) from t1; www.2cto.com step 2, delete the data in the table from t1; commnit; Step 3: Obtain the current scn select dbms_flashback.get_system_change_number from dual; Step 4,

Common oracle System Table 1. SQL-based common system Table 1.1. system Object table sysobjects www.2cto.com Function Description: stores the objects of the current database, such as constraints, default values, logs, rules, stored procedures, and

The execution sequence of oracle clauses an SQL statement contains many clauses. When writing SQL statements, it is very important to understand the priority of executing SQL clauses, otherwise, a simple SQL statement may be converted into multiple

In three cases of Oracle paging, there are three types of Oracle paging: www.2cto.com 1. rownumselect * from emp 2. show rownum [Oracle allocated] select a1. *, rownum rn from (select * from emp) a1; 3. 4. several query changes. to specify a query

Differences between primary keys, indexes, and pages in Oracle and Mysql: 1. Primary keys. Oracle cannot implement auto-increment, while mysql can implement auto-increment. Create a sequence in www.2cto.com oracle, SEQ_USER_Id.nextval 2. Index:

In Oracle, the branch statement condition branch statement: www.2cto.com pl/SQL provides three branch statements: if -- then, if --- then -- else, if -- then -- ifesle, you can enter an employee name. If the employee's salary is lower than 2000, the

A simple oracle network configuration is provided below for the Simple Network Configuration of Oracle, and it is an effective SQL code www.2cto.com # sqlnet. ora SQLNET. AUTHENTICATION_SERVICES = (ETS) SQL code # tnsnames. ora

In Oralce, the stored procedure ref cursor that returns the result set has a returned value stored procedure (list result set) Case: Write a process, enter the Department number, and return information of all employees of the Department. The

I. Summary of the use of rollback segments: 1.1 Seq Sequence Value: Step 1: Each rollback block header has a SEQ value. When the transaction is extended to the new area, the SEQ in the new area is the SEQ plus 1 in the previous area. For example:Www.

Modify ip address 1 in Oracle RAC, disable crs_stop-all2, modify Information 3 and www.2cto.com a in/etc/hosts, and modify public ip. B. Modify the CIDR Block mask -- view the current configuration: [root @ raw1 bin] #. /oifcfg getif-globaleth0 10.85

SQL> alter database begin backup; -- start to back up Database altered. www.2cto.com SQL> host cp/u01/oracle/oradata/ORCL /*. dbf/u01/oracle/dump1/-- power-off before execution is complete. When abort restarts the database, the problem [root @

How to exit the sqlplus ed operation today to go to sqlplus. After the statement is executed, modify it with ed, but it will not exit, as shown in the following: SQL> select * from dba_tables www.2cto.com SQL> ed Wrote file afiedt. buf 38: q? /?

Oracle learning records-extended tablespace oracle learning records-extended tablespaces: (1) adding tablespaces to data files; (2) modifying the size of data files, data files can be automatically expanded. Method 1 for extending table space at www.

View the NLS_LANG method view the NLS_LANG method Windows use: www.2cto.com echo % NLS_LANG % E: \> echo % NLS_LANG % AMERICAN_AMERICA.ZHS16GBKUnix use: env | grep NLS_LANG such: /opt/oracle> env | grep NLS_LANGNLS_LANG =

Modify existing data columns in oracle, if some columns of existing data, if you want to change the type, sometimes it is more troublesome, will appear: ORA-01439: column to be modified must be empty to change datatype modification method: