Oracle

In Oracle 10g, we may often encounter OEM problems that cannot be used normally, but the causes are different. In the end, most problems can be solved through the emca command, for more information, see online help. The following describes some

Recently, many new Oracle beginners or those who upgraded from the old version of Oracle to 10 Gb asked questions about how to manually create a database in Oracle 10 Gb. Today, we are free to write down the whole process of manual database creation

Oci_bind_by_name (resource stmt, string ph_name, mixed & variable [, int maxlength [, int type]) The first thing to note about this function is the maxlength parameter. You need to take a closer look at the descriptions in the manual:The length

801. ALL_DIM_HIERARCHIESDisplays the dimension levels. 802. ALL_DIM_JOIN_KEYDescribes the connection between two dimensions. 803. ALL_DIM_LEVEL_KEYDescribes dimension columns. 804. ALL_DIM_LEVELSDescription dimension level. 805.

Create table testabc (A Number,B Date); Insert into testabc (a, B) values (1, TO_DATE (1-MAY-2010/, DD-MON-YYYY/HH24: MI ));Insert into testabc (a, B) values (1, TO_DATE (2-MAY-2010/, DD-MON-YYYY/HH24: MI ));Insert into testabc (a, B) values (1,

Exception in thread "main" java. lang. InternalError: Can't connect to X11 window server using '192. 168.3.10: 100' as the value of the DISPLAY variable.At sun. awt. X11GraphicsEnvironment. initDisplay (Native Method)At sun. awt.

1. Obtain the values of 6th to 10th records in the table.1.1 Method 1: Use the minus statementAssume that the ddl statement is as follows:The following is a reference clip:Create table t (ID VARCHAR2 (4) primary key, value int)The first method is to

1. Waiting for monitoring casesSelect event, sum (decode (wait_Time, 0, 0, 1) "Prev ",Sum (decode (wait_Time, 0, 0) "Curr", count (*) "Tot"From v $ session_WaitGroup by event order by 4;2. rollback segment contentionSelect name, waits, gets,

First, let's take A look at the data type. For comparison, use the> =; for comparison, use the to_date function to convert the data type of field B, and specify the format as needed;A LOGON_TIME DATEB KPI_VALUE VARCHAR2 (400)The following are

Summary:DDL is a type of operation that consumes a lot of resources. Do not use DDL statements during running. The temporary tables required by the application should be created before running. You do not have to create one in each stored procedure.

In Linux, sqlplus cannot use the up or down key. The first step is to install the readline package on the installation disc of readline centos. Find and install all packages starting with readline. [Root @ oracle11g ~] # Rpm-ivh readline *  Step 2:

Use PL/SQL to execute OS commands [SQL] create or replace and compile java source named ExeSysCommand as import java. io. *; public class ExeSysCommand {public static String ExeCmd (String args) {Runtime run = Runtime. getRuntime (); Process process

Configure table space, create users, and import Databases --- Cmd go to the dos interface sqlplus/as sysdba ---- create table space --- create tablespace ciqpspace DATAFILE 'd: \ oracle \ product \ 10.2.0 \ oradata \ orcl \ CIQP when creating the

Oracle foreign key table search SQL code Select B. table_name primary key table name, B. column_name primary key column name,. table_name foreign key table name,. column_name foreign key column name From (Select. constraint_name, B. table_name, B.

Modify oracle memory usage # Su oracle $ cd $ ORACLE_HOME $. /sqlplus/nolog> connect/as sysdba;> show parameter sga; (view memory usage) name type value values ----------- ------------- lock_sga boolean FALSE pre_page_sga boolean FALSE sga_max_size

Oracle Database Programming: You can use a cursor in PL/SQL to obtain data using a cursor in PL/SQL. A cursor can be divided into an implicit cursor and a display cursor. A cursor is directly associated with a database equivalent to a global

[Oracle]-[ROWNUM and Index]-Impact of indexes on ROWNUM Retrieval Select ename, salfrom empwhere rownum  Are they the same? The first SQL statement first finds the records with ROWNUM create table t as select * from dba_objects;create table t2 as

Oracle Data Pump usage (1) Oracle Data Pump expdpimpdp I. Data Pump export steps: 1. Create a directory (I created it using a system user, scott user does not have permission) create directory dump1 as 'e:\dump' ;  2. Authorize scott user grant read,

The use of PLSQL set types is summarized in pl SQL. collection is an object composed of a group of ordered elements. The types of these elements must be consistent. Pl SQL divides collection into three types: Associative arrays (also called index-by

Common simple functions in oracle (ONE)In oracle, functions are divided into multiline functions and single-line functions. Single-line functions can be directly referenced in plsql blocks, but multiline functions can only be referenced in Embedded