Oracle

Oracle with clause learning with: [SQL] with -- query the total salary of the Department and Department dept_costs as (www.2cto.com select d. department_name, sum (e. salary) dept_total from departments d, employees e where d. department_id = e.

1. Check the locked table.SELECT lpad ('', decode (l. xidusn, 0,3, 0) | l. oracle_username User_name,O. owner, o. object_name, o. object_type, s. sid, s. serial #FROM v $ locked_object l, dba_objects o, v $ session sWHERE l. object_id = o.

What should I do if I forget the password of an ORACLE user? What should I do if I forget the database in use? I only remember the administrator password. Modify the following statement (the blue part is the typed command): SQL * Plus: Release 11.1.0

Oracle PASSWORD expiration and lock settings query settings of the DEFAULT profile PASSWORD Expiration parameter SQL code select * from dba_profiles where profile = 'default' and resource_name = 'password _ LIFE_TIME '; www.2cto.com PROFILE RESOURCE_

ORA-01843: Invalid month issue execute the following script create table myemp (EMP_ID NUMBER, EMP_NAME VARCHAR2 (10), sal number, Joined_date DATE, DEPT_NO NUMBER ); www.2cto.com insert into myemp values (3, 'three ', 1500, To_Date ('01-MON-2007', '

Flow Control statements in PL/SQL and temporary Oracle tables [SQL] create global temporary table temp_dept (dno number, dname varchar2 (10) on commit delete rows; insert into temp_dept values (10, 'abc'); drop table temp_dept -- the temporary table

Statement 1 for oracle mass data update. For example, a flow field is added to a table, which is not empty and unique. 2. The data volume of the table is 3000000. 3. Assume that the table name is test. 4 www.2cto.com 5 1. Use cursor. 6 declare 7

Sqlplus commonly used set commands set colsep ''; // # -- set echo off, a domain output separator; // # -- display each SQL command in the start script, the default value is on set feedback off; // # -- display the number of records processed by

ORA-01480: trailing null missing from STR bind value problem [problem] Using PL/SQL to change data, the field in the table is varchar2 (4000 ), when you modify a data in a table, use for update directly to make a data change. The length of the data

Install oracle 10g configuration file change reference on win7 install Oracle in win7 system, there are the following points to note: Java code 1. You need to install it under the administrator user. 2. Because oracle 10g is not compatible with win7

Oracle analysis functions (year-on-year, period-over-period, cumulative, base-ratio) create table salaryByMonth (employeeNo varchar2 (20), yearMonth varchar2 (6), salary number); insert into SALARYBYMONTH, YEARMONTH, SALARY) values (1, '20140901', 20

Oracle Complex query Exercise 1. delete duplicate records (when there is no primary key in the table) www.2cto.com SQL code create table TESTTB (bm varchar (4), mc varchar2 (20) insert into TESTTB values (1, 'aaa'); insert into TESTTB values (1,

Oracle removes duplicate record statements. For example, there is a personnel table (table name: peosons) select p1. * from persons p1, persons p2 where p1.id <> p2.id and p1.cardid = p2.cardid and p1.pname = p2.pname and p1.address = p2.address.

PLSQL creates users and assigns permissions 1. First, use the dba permission role to log on to PLSQL 2. Select File-New-User and enter the account and password to be created, select the tablespace www.2cto.com 3. You must assign the following

Oracle window clause analysis is unclear about the Oracle window. Recently, I read the description of this Part in the "Advanced SQL Programming" written by Laurent Schneider, and I feel that it is clearly written, for viewing. The partition clause

To connect to Oracle without installing the Oracle client using PLSQL, It is very troublesome to install an ORACLE client of hundreds of megabytes. This section describes how to connect to the oracle database by using a thin client that does not

Oracle recursive operations (Tree operations) start with org_id = '1' connect by prior parent_id = son_id 1. preface oracle recursive operations are often used in the directory structure on our web pages. It is said that they are frequently asked

Common hint usage in Oracle 1. /* + ALL_ROWS */indicates to select the overhead-Based Optimization Method for the statement block and obtain the optimal throughput to minimize resource consumption. example: SELECT/* + ALL + _ ROWS */EMP_NO, EMP_NAM,

The LOB data type in Oracle and the LOB type www.2cto.com LOB data type in oracle for processing this type in ibatis provide specific data types such as BOLB, COLB, and BFILE, it is used to store unstructured big data blocks, such as text, images,

Resets the oracle sequence from the specified number. The SQL code www.2cto.com declare n number (10); v_startnum number (10): = 10000001; -- the number of v_step numbers (10): = 1; -- step tsql varchar2 (200); v_seqname varchar2 (200): = 'mip _