Oracle

The sequence resetting of Oracle found that an exception occurred to the incremental value of a sequence, but it was not incremented as expected. Therefore, the sequence reconstruction method must be used to fix the problem. However, in order to

Oracle returns an even number of data rows. When the number of data rows in the query table is an odd number, a blank row is automatically added and an even number of data rows are returned. If the number of data rows in the query table is an even

Oracle-autonomous transaction analysis PRAGMA AUTONOMOUS_TRANSACTION database transaction is a unit operation. Either all operations are successful or all operations fail. In Oracle, a transaction starts from executing the first data management

Oracle paging SQL statement 1. select * from t_xiaoxi where ROWID in (select rid from (select rownum rn, rid from (select rowid rid, cid fromt_xiaoxi order by cid desc) where rownum 9980) order by cid desc; execution time 0.03 seconds 2. select *

When compiling pl/SQL programs, you can define variables and constants. scalar type (scalar) B. composite c. reference d. lob (large object) scalar type (scalar)Declarec_tax_rate number (3, 2): = 0.03; -- username www.2cto.com -- v_ename emp. ename %

One solution for ORA-01034 and ORA-27101 is to configure Win2003 + Oracle 11g + Memory 3G1, first check whether oracle listening and oracle services are started. Start oracle listener: In the command line window of cmd, enter lsnrctl start and press

Use rman duplicate... from active database to create external uard (for oracle 11g) oracle 10g can implement external uard through the backup-based rman DUPLICATE, back up the DATABASE through steps, and restore the DATABASE on the standby side. At 1

The general process of using oracle 11g r2 LogMiner! Use the oracle log analysis tool LogMiner. set the date format to alter system set nls_date_format = 'yyyy-mm-dd hh24: mi: ss' scope = spfile; select to_char (sysdate, 'yyyy-mm-dd hh24: mi: ss ')

Solution to the Problem -- the symbol "(" one of the following is required) encountered a problem during the creation of the stored PROCEDURE today: www.2cto.com procedure qiuyue. PRO_INSERT_DYNA_TABLE compilation error: PLS-00103: Symbol "(" when

ORA-01578 (data block corruption) Error resolution error: the following error occurred during exp: EXP-00056: encountered ORACLE error 1578 ORA-01578: ORACLE data block corruption (file number 4, block number 65) ORA-01110: data file 4: 'e: \ ORACLE

Common functions of Oralce SQL language (I) character functions this function generally receives characters as parameters and can return characters or numbers. The most common functions are. the CONCAT function is mainly used for string connection.

In oracle, large data fields are updated. Recently, a table with more than 0.7 million data records is updated. The update statement is used directly at the beginning, as shown below: 1 www.2cto.com update content set pic_bak = pic; it is found that

Oracle primary key auto-increment 1. Compared with the local primary key number type, the id is the max (id) to obtain the table each time the data is stored, followed by + 1, the time can be used as the primary key and is unique. 2. The official

Create and manage Data Definition Language (DDL) statements are used to define the database structure or schema. some examples: · CREATE-to create objects in the database · ALTER-alters the structure of the database · DROP-delete objects from the

In the Oracle trigger, select into reports no_data_found Exception Handling. In red, create or replace trigger TIG_MONITOR_ALARM after insert on failed for each row www.2cto.com declare -- standard value number; -- Alarm fact table id liveid number;

Oracle update operation copy TABLE: [SQL] CREATE TABLE myemp AS SELECT * FROM emp; www.2cto.com 1. add data Syntax: [SQL] INSERT INTO tablename [(field name 1 field name 2,...)] VALUES (value 1, value 2 ,...); add a piece of data: Recommended usage:[

In oracle dual explanation, oracle introduces dual to conform to the Syntax 1. From the perspective of name, dual is not a acronym, but a complete word. Dual refers to logarithm, Which is dual and dual when used as an adjective. 2. The dual table in

When Windows 7 is enabled, plsql logon fails. A blank prompt box is displayed. Solution: Sometimes ORACLE is installed in Windows 7, and the database cannot be connected using cmd plsplus and plsql software. plsql reports a blank prompt box and

In Oracle, TO_DATE TO_CHAR format TO_CHAR converts a date or number to a string TO_DATE format to convert a string to a database. The date type conversion function TO_NUMBER converts a character to a number. TO_CHAR uses the TO_CHAR function to

In Oracle, The REGEXP_SUBSTR function in Oracle is described as follows: in oracle, '17, 20,23 'is split into '17', '20 ', '23. REGEXP_SUBSTR function Format: function REGEXP_SUBSTR (String, pattern, position, occurrence, modifier) _ srcstr: String _