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ORA 00054  resource busy and acquire with NOWAIT specified
 
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ORA 00054 resource busy and acquire with NOWAIT specified Find More details Here: http://oracletech2u.blogspot.com/2014/03/ora-00054-resource-busy-and-acquire.html
Views: 1310 oratech ahmed
What is FOR UPDATE and WHERE CURRENT OF Clauses in PLSQL
 
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What is FOR UPDATE and WHERE CURRENT OF Clauses in PLSQL SQL Tutorial SQL Tutorial for beginners PLSQL Tutorial PLSQL Tutorial for beginners PL/SQL Tutorial PL SQL Tutorial PL SQL Tutorial for beginners PL/SQL Tutorial for beginners Oracle SQL Tutorial
Views: 1357 TechLake
Oracle SELECT FOR UPDATE /عربي
 
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you can visit my website maxvlearn.com
Views: 1401 khaled alkhudari
01 Oracle database Table lock
 
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Purpose Use the LOCK TABLE statement to lock one or more tables, table partitions, or table subpartitions in a specified mode. This lock manually overrides automatic locking and permits or denies access to a table or view by other users for the duration of your operation. Some forms of locks can be placed on the same table at the same time. Other locks allow only one lock for a table. A locked table remains locked until you either commit your transaction or roll it back, either entirely or to a savepoint before you locked the table. A lock never prevents other users from querying the table. A query never places a lock on a table. Readers never block writers and writers never block readers. See Also: Oracle Database Concepts for a complete description of the interaction of lock modes COMMIT ROLLBACK SAVEPOINT Prerequisites The table or view must be in your own schema or you must have the LOCK ANY TABLE system privilege, or you must have any object privilege on the table or view. ROW SHARE ROW SHARE permits concurrent access to the locked table but prohibits users from locking the entire table for exclusive access. ROW SHARE is synonymous with SHARE UPDATE, which is included for compatibility with earlier versions of Oracle Database. ROW EXCLUSIVE ROW EXCLUSIVE is the same as ROW SHARE, but it also prohibits locking in SHARE mode. ROW EXCLUSIVE locks are automatically obtained when updating, inserting, or deleting. SHARE UPDATE See ROW SHARE. SHARE SHARE permits concurrent queries but prohibits updates to the locked table. SHARE ROW EXCLUSIVE SHARE ROW EXCLUSIVE is used to look at a whole table and to allow others to look at rows in the table but to prohibit others from locking the table in SHARE mode or from updating rows. EXCLUSIVE EXCLUSIVE permits queries on the locked table but prohibits any other activity on it. NOWAIT Specify NOWAIT if you want the database to return control to you immediately if the specified table, partition, or table subpartition is already locked by another user. In this case, the database returns a message indicating that the table, partition, or subpartition is already locked by another user. WAIT Use the WAIT clause to indicate that the LOCK TABLE statement should wait up to the specified number of seconds to acquire a DML lock. There is no limit on the value of integer. If you specify neither NOWAIT nor WAIT, then the database waits indefinitely until the table is available, locks it, and returns control to you. When the database is executing DDL statements concurrently with DML statements, a timeout or deadlock can sometimes result. The database detects such timeouts and deadlocks and returns an error.
Views: 1078 Md Arshad
02 Shared Lock & Exclusive Lock In oracle database table lock
 
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Purpose Use the LOCK TABLE statement to lock one or more tables, table partitions, or table subpartitions in a specified mode. This lock manually overrides automatic locking and permits or denies access to a table or view by other users for the duration of your operation. Some forms of locks can be placed on the same table at the same time. Other locks allow only one lock for a table. A locked table remains locked until you either commit your transaction or roll it back, either entirely or to a savepoint before you locked the table. A lock never prevents other users from querying the table. A query never places a lock on a table. Readers never block writers and writers never block readers. See Also: Oracle Database Concepts for a complete description of the interaction of lock modes COMMIT ROLLBACK SAVEPOINT Prerequisites The table or view must be in your own schema or you must have the LOCK ANY TABLE system privilege, or you must have any object privilege on the table or view. ROW SHARE ROW SHARE permits concurrent access to the locked table but prohibits users from locking the entire table for exclusive access. ROW SHARE is synonymous with SHARE UPDATE, which is included for compatibility with earlier versions of Oracle Database. ROW EXCLUSIVE ROW EXCLUSIVE is the same as ROW SHARE, but it also prohibits locking in SHARE mode. ROW EXCLUSIVE locks are automatically obtained when updating, inserting, or deleting. SHARE UPDATE See ROW SHARE. SHARE SHARE permits concurrent queries but prohibits updates to the locked table. SHARE ROW EXCLUSIVE SHARE ROW EXCLUSIVE is used to look at a whole table and to allow others to look at rows in the table but to prohibit others from locking the table in SHARE mode or from updating rows. EXCLUSIVE EXCLUSIVE permits queries on the locked table but prohibits any other activity on it. NOWAIT Specify NOWAIT if you want the database to return control to you immediately if the specified table, partition, or table subpartition is already locked by another user. In this case, the database returns a message indicating that the table, partition, or subpartition is already locked by another user. WAIT Use the WAIT clause to indicate that the LOCK TABLE statement should wait up to the specified number of seconds to acquire a DML lock. There is no limit on the value of integer. If you specify neither NOWAIT nor WAIT, then the database waits indefinitely until the table is available, locks it, and returns control to you. When the database is executing DDL statements concurrently with DML statements, a timeout or deadlock can sometimes result. The database detects such timeouts and deadlocks and returns an error.
Views: 1055 Md Arshad
Oracle - Locking - Beginner
 
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Oracle - Locking - Beginner
Views: 8855 Chris Ostrowski
#nowait update 1
 
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#NOWAIT Release Date!! Sept. 6th 2011
Views: 514 TheGradTV
Resourse Busy demo.mp4
 
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Demo on 11g parameter ddl_lock_timeout parameter
Oracle Part 7 Where clause and Update
 
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Default clause, where condition, update statement
Views: 1079 Free OpenMentor
03 Dead Lock in oracle database
 
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DML Locks DML locks or data locks guarantee the integrity of data being accessed concurrently by multiple users. DML locks help to prevent damage caused by interference from simultaneous conflicting DML or DDL operations. By default, DML statements acquire both table-level locks and row-level locks. The reference for each type of lock or lock mode is the abbreviation used in the Locks Monitor from Oracle Enterprise Manager (OEM). For example, OEM might display TM for any table lock within Oracle rather than show an indicator for the mode of table lock (RS or SRX). Row Locks (TX) Row-level locks serve a primary function to prevent multiple transactions from modifying the same row. Whenever a transaction needs to modify a row, a row lock is acquired by Oracle. There is no hard limit on the exact number of row locks held by a statement or transaction. Also, unlike other database platforms, Oracle will never escalate a lock from the row level to a coarser granular level. This row locking ability provides the DBA with the finest granular level of locking possible and, as such, provides the best possible data concurrency and performance for transactions. The mixing of multiple concurrency levels of control and row level locking means that users face contention for data only whenever the same rows are accessed at the same time. Furthermore, readers of data will never have to wait for writers of the same data rows. Writers of data are not required to wait for readers of these same data rows except in the case of when a SELECT... FOR UPDATE is used. Writers will only wait on other writers if they try to update the same rows at the same point in time. In a few special cases, readers of data may need to wait for writers of the same data. For example, concerning certain unique issues with pending transactions in distributed database environments with Oracle. Transactions will acquire exclusive row locks for individual rows that are using modified INSERT, UPDATE, and DELETE statements and also for the SELECT with the FOR UPDATE clause. Modified rows are always locked in exclusive mode with Oracle so that other transactions do not modify the row until the transaction which holds the lock issues a commit or is rolled back. In the event that the Oracle database transaction does fail to complete successfully due to an instance failure, then Oracle database block level recovery will make a row available before the entire transaction is recovered. The Oracle database provides the mechanism by which row locks acquire automatically for the DML statements mentioned above. Whenever a transaction obtains row locks for a row, it also acquires a table lock for the corresponding table. Table locks prevent conflicts with DDL operations that would cause an override of data changes in the current transaction. Table Locks (TM) What are table locks in Oracle? Table locks perform concurrency control for simultaneous DDL operations so that a table is not dropped in the middle of a DML operation, for example. When Oracle issues a DDL or DML statement on a table, a table lock is then acquired. As a rule, table locks do not affect concurrency of DML operations. Locks can be acquired at both the table and sub-partition level with partitioned tables in Oracle. A transaction acquires a table lock when a table is modified in the following DML statements: INSERT, UPDATE, DELETE, SELECT with the FOR UPDATE clause, and LOCK TABLE. These DML operations require table locks for two purposes: to reserve DML access to the table on behalf of a transaction and to prevent DDL operations that would conflict with the transaction. Any table lock prevents the acquisition of an exclusive DDL lock on the same table, and thereby prevents DDL operations that require such locks. For example, a table cannot be altered or dropped if an uncommitted transaction holds a table lock for it. A table lock can be held in any of several modes: row share (RS), row exclusive (RX), share (S), share row exclusive (SRX), and exclusive (X). The restrictiveness of a table lock's mode determines the modes in which other table locks on the same table can be obtained and held.
Views: 305 Md Arshad
xml update
 
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Views: 109 Patrycja J
How Oracle Determines Wait Time When It Releases Control
 
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Have you ever wondered how the Oracle Database 12c (and earlier versions) determines the wait time when it has absolutely no control over how long the wait will take? If so, then read on in my blog posting: http://blog.orapub.com/20140630/How-The-Oracle-Database-Determines-Wait-Time-When-It's-Not-Set.html Check out OraPub's Online Institute where this topic is part of the seminar, Introduction To Oracle Time Based Analysis. https://resources.orapub.com/OraPub_Online_Seminars_About_Oracle_Database_Performance_s/100.htm
Views: 562 OraPub, Inc.
00054
 
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Views: 0 東工大舞研
SQL server Shutdown
 
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Shut down MS SQL server without wait.
Views: 3318 satalaj
Oracle of Seasons-Episode 22: Cylon Tigers
 
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He's a Cylon...no wait. Maybe it's you! Shiny Sprites are James and Mike!
Views: 6 James C.
Oracle SQL Developer Tutorial For Beginners  45  TCL   COMMIT Demo
 
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Oracle SQL Developer Tutorial For Beginners Series. This course introduces Oracle SQL Development for its subscribers. Currently this is based on Oracle 12c. The test environment is in Windows 10.
Views: 2636 Sam Dhanasekaran
Fix Problem with Multi Primary key project MVC
 
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Fix the problem with generated View in MVC Project when there're multi primary keys
Views: 31 Taijou Roukun
oracle in select
 
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oracle in select
Views: 488 Prakash Mishra
Cursor For Loop in PL/SQL - Explicit Cursor - Parameterized Cursors - Explicit Cursor Orcle
 
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Cursor for loop is a very powerful looping structure for Oracle explicit cursor. Parameterized cursors help to make the program more efficient. Cursor for loop when used for explicit cursor makes the program compact and easy to read and write. #Crazy4DB #OraclePLSQL #LearnPLSQL #Crazy4DB #MunshiSir #LearnOracle Other PL/SQL videos : PL/SQL cursors : https://youtu.be/pZQMjWYpWSs PL/SQL conditional Statements : https://youtu.be/5e6eqYtgJAc PL/SQL Basic : https://youtu.be/5fXsfOTRSHc PL/SQL Exception : https://youtu.be/tahOBL8Ogss PL/SQL %TYPE Anchored type : https://youtu.be/tbKvzhdLmMU PL/SQL Record Data type : https://youtu.be/Ev7uriDI96A PL/SQL Loops : https://youtu.be/IVmbdR2Dbz4 SQL Transaction : https://youtu.be/ZjK31EuWFsY PL/SQL Loops : https://youtu.be/IVmbdR2Dbz4 Video Index : What is explicit cursor : 2.00 Why use explicit cursor : 3:39 Step of Explicit Cursor : 7:43 Explicit Cursor attributes : 14:06 Explicit cursor example : 19:40 Cursor For loop : 27:00 Parameterized cursor : 34:52 Cursor for locking for update nowait : 38:49 Program code : Use of explicit cursor with simple loop ==================================== declare n number; s number; e emp.ename%type; cursor c1 is select distinct sal from emp where sal is not null order by sal desc; cursor c2 is select ename from emp where sal = s; begin n := '&EnterRank'; open c1; fetch c1 into s; while c1%found loop if c1%rowcount = n then open c2; loop fetch c2 into e; if c2%found then dbms_output.put_line(e||' '||s); else exit; end if; end loop; exit; end if; fetch c1 into s; end loop; dbms_output.put_line('no more emp'); exception when value_error then dbms_output.put_line('value must be numeric'); end; Using Cursor for loop ================================== declare n number; s number; cursor c1 is select distinct sal from emp where sal is not null order by sal desc; cursor c2 is select ename from emp where sal = s; begin n := '&EnterRank'; for vsal in c1 loop if c1%rowcount = n then s := vsal.sal; for vname in c2 loop dbms_output.put_line(vname.ename||' '||s); end loop; end if; end loop; dbms_output.put_line('no more emp'); exception when value_error then dbms_output.put_line('value must be numeric'); end; Parameterized cursor example ==================================== declare n number; cursor c1 is select distinct sal from emp where sal is not null order by sal desc; cursor c2 (s emp.sal%type) is select ename from emp where sal = s; begin n := '&EnterRank'; for vsal in c1 loop if c1%rowcount = n then for vname in c2(vsal.sal) loop dbms_output.put_line(vname.ename||' '||vsal.sal); end loop; end if; end loop; dbms_output.put_line('no more emp'); exception when value_error then dbms_output.put_line('value must be numeric'); end; Locking for Transaction by explicit cursor ====================================== declare vdno emp.deptno%type; incr number; lck exception; pragma exception_init(lck, -00054); cursor c1 (pdno emp.deptno%type) is select * from emp where deptno = pdno for update nowait; begin vdno := '&DeptNo'; incr := '&Increment'; open c1(vdno); update emp set sal = sal + incr where deptno = vdno; if sql%rowcount [greater than] 0 then dbms_output.put_line(sql%rowcount||' rows updated'); else dbms_output.put_line('department does not exist'); end if; close c1; exception when value_error then dbms_output.put_line('check input values'); when lck then dbms_output.put_line('rows locked - try later'); end;
Views: 115 Crazy4 DB
What is Meet waiting error in PLSQL
 
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MEET WAITING ERROR PLSQL
Что нового в MySQL 8.0? / Дмитрий Ленев (Oracle)
 
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РИТ++ 2017, Backend Conf Зал Сан-Паулу, 6 июня, 16:00 Тезисы: http://backendconf.ru/2017/abstracts/2801.html 8.0 - это следующая крупная версия СУБД MySQL Server, которая на данный момент находится в активной разработке. Цель данного доклада - познакомить слушателей с новыми возможностями и улучшениями производительности,которые реализованы в этой версии. В частности, мы поговорим о: - новом словаре данных, связанных с ним изменениях в INFORMATION_SCHEMA, а также поддержке атомарного DDL; - новых возможностях в выполнении запросов - поддержке Common Table Expressions и Window функций, "невидимых" и descending индексах; - улучшениях в поддержке Unicode; - возможностях более гибкой работы с блокировками в запросах (SKIP LOCKED/NOWAIT); - ролях и других изменениях в системе привилегий; - улучшениях в репликации.
Views: 2053 HighLoad Channel
Avoiding ORA 01555
 
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How to avoid ORA-01555. Music: https://www.bensound.com
Views: 476 ORA-600
Oracle SQL Developer Tutorial For Beginners   44  TCL   COMMIT
 
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Oracle SQL Developer Tutorial For Beginners Series. This course introduces Oracle SQL Development for its subscribers. Currently this is based on Oracle 12c. The test environment is in Windows 10.
Views: 1386 Sam Dhanasekaran
Solved! - Unable to modify table.   Execution Timeout Expired
 
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'B_DEVICE_ALL_SATS (dv)' table - Unable to modify table. Execution Timeout Expired. The timeout period elapsed prior to completion of the operation or the server is not responding.
Views: 5108 Maruti AIR Tech
How to check your mobile number in GP:Aktel:Airtel:Banglalink in Bangladesh
 
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How to check your mobile number in GP:Aktel:Airtel:Banglalink in Bangladesh Find More details Here: http://oracletech2u.blogspot.com/2014/03/how-to-check-your-mobile-number-in.html
Views: 7572 oratech ahmed
Implicit cursors - Implicit Cursor Example - Implicit Cursors in PL SQL - Where Current of
 
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Implicit cursors in PL SQL consists of four types of statements - SELECT, INSERT, UPDATE, DELETE. This video explains the use of Implicit cursors in PL SQL with examples. With UPDATE and DELETE statement in implicit cursor we may use WHERE CURRENT OF clause to coordinate implicit cursor with current row in the explicit cursor #Crazy4DB #OraclePLSQL #LearnPLSQL #Crazy4DB #MunshiSir #LearnOracle Video Index : What is implicit cursor - 01:12 Which statements are used - 03:01 Special Exceptions - 03 : 52 Example program - 08:26 Where current of example - 14:21 Other PL/SQL videos : PL/SQL cursors : https://youtu.be/pZQMjWYpWSs PL/SQL explicit cursors : https://youtu.be/uH2MQChSh7w PL/SQL conditional Statements : https://youtu.be/5e6eqYtgJAc PL/SQL Basic : https://youtu.be/5fXsfOTRSHc PL/SQL Exception : https://youtu.be/tahOBL8Ogss PL/SQL %TYPE Anchored type : https://youtu.be/tbKvzhdLmMU PL/SQL Record Data type : https://youtu.be/Ev7uriDI96A PL/SQL Loops : https://youtu.be/IVmbdR2Dbz4 SQL Transaction : https://youtu.be/ZjK31EuWFsY PL/SQL Loops : https://youtu.be/IVmbdR2Dbz4 Program Code used in Implicit Cursor examples : ========================================== Example :Update salary of employees of given department with given amount of increment declare vdno emp.deptno%type; incr number; burd number; lck exception; pragma exception_init(lck, -00054); cursor c1 (pdno emp.deptno%type) is select * from emp where deptno = pdno for update nowait; begin vdno := '&DeptNo'; incr := '&Increment'; open c1(vdno); update emp set sal = sal + incr where deptno = vdno; if sql%rowcount [greater than] 0 then burd := incr * sql%rowcount; dbms_output.put_line('Total Burden '||burd); else dbms_output.put_line('department does not exist'); end if; close c1; exception when value_error then dbms_output.put_line('check input values'); when lck then dbms_output.put_line('rows locked - try later'); end; WHERE CURRENT OF example ======================================= Problem : In the above problem if it is required to limit the increment to only such employees who do not cross a certain specified limit. For those who are not found eligible for this criteria then they have to be skipped. declare vdno emp.deptno%type; incr number; lim number; burd number; rupd number := 0; rnupd number := 0; lck exception; pragma exception_init(lck , -00054); cursor c1(pdno emp.job%type) is select * from emp where deptno = pdno for update nowait; begin vdno := '&deptno'; incr := &increment; lim := &limit; for var in c1(vdno) loop rupd := c1%rowcount; if var.sal + incr [less than] lim then update emp set sal = sal + incr where current of c1; else dbms_output.put_line ('employee '||var.ename|| ' not updated'); rnupd := rnupd + 1; end if; end loop; rupd := rupd - rnupd; burd := rupd * incr; dbms_output.put_line ('burden = '||burd); dbms_output.put_line ('updated = '|| rupd); dbms_output.put_line ('not updated = '|| rnupd); exception when lck then dbms_output.put_line('rows are locked - try later'); end;
Views: 124 Crazy4 DB
Stop Teradata SQL Assistant from getting Timed Out
 
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How to make sure that Teradata SQL Assistant connection remain active even when we are not using it.
Views: 4320 TeradataSQLTutorials