We could say the v$sqlarea is the parent of the v$sql. v$sqlarea records the information of the parent cursor while v$sql preserve the information of child cursor . There is one column calledVERSION_COUNT in the v$sqlarea, its value can tell us how many child cursors does this parent curs...
可执行如下SQL语句: [sql] select connect_by_root(child_col) root, level , decode(connect_by_isleaf,0,'No',1,'Yes') is_leaf, sys_connect_by_path(child_col,'/') path from tree start with parent_col is null connect by prior child_col=parent_col; 1. 2. 3. 4. [sql] 树形查询的...
I have been doing hierarchical queries in RDBMS (Oracle, SQL Server 2000/2005, DB2) for 20+ years. For SQL Server, there are a number of ways to do this in T-SQL. However, the solution can vary depending upon your application and the use patterns. Generally, the best way that I hav...
TRANSLATION_MISMATCH ,无法共享child cursor。Oracle会因此在此parent cursor 下创建一个新的child cursor,也就是一个hard parse。 因此,SQL 是否可以共享是与parent cursor无关的,而是由child cursor决定的。 从v$sql_shared_cursor可以获得详细的无法共享的原因: select * from v$sql_shared_cursor where kglhdpar...
1. sharedSQL,parent cursor,child cursor 概念: 所有SQL都是Oracle暗式共享的(implicitly sharable)。当用户A发出一条SQL后,Oracle会根据SQL文本内容生成hash value(10g还有唯一的SQL_ID),以便能够快速找到 Shared pool已经存在的相同SQL。如果找不到,则Oracle会为这个SQL创建一个parent cursor和一个child cursor,这...
p_module_static_id => 'Child', p_sync_static_id => 'Dynamic Deptno', p_sync_parameters => l_parameters ); end loop; end; When theSynchronizebutton is clicked, the PL/SQL block will first synchronize the Parent REST API, and the Child REST API afterwards; all in one. ...
“Unable to enlist in the transaction” with Oracle linked server from MS SQL Server [<Name of Missing Index, sysname,>] in non clustered index [Execute SQL Task] Error: The value type (__ComObject) can only be converted to variables of type Object. [ODBC Driver Manager] Data source nam...
Because they’re your tables you know that you’ve defined them so that data in parent partition(N) and child partition(N) are perfectly synchronised – but Oracle doesn’t know this, so you can’t drop the parent partition unless you actuallydisabletheforeign key constraint. And if the ta...
Re: Recursive: get all child nodes for parent Ilir Dibrani December 21, 2009 10:08AM Sorry, you can't reply to this topic. It has been closed. Content reproduced on this site is the property of the respective copyright holders. It is not reviewed in advance by Oracle and does not nec...
ANSI-SQL標準です 兄弟表の結合はサポートされません 例のとおりに操作する場合は、スクリプトparentchildtbls_loaddata.sqlをダウンロードして、次に示すように実行します。このスクリプトにより、例で使用する表が作成され、表にデータがロードされます。 KVSTOREまたはKVLiteを起動し、SQL.sh...