FOR emp_record IN sal_cursor LOOP IF emp_record.salary < 5000 THEN UPDATE employee SET salary = emp_record.salary * 1.1 WHERE CURRENT OF sal_cursor; // 表示当前行的意思 END IF; END LOOP; END; Blog 1.什么是游标 为了处理SQL语句,ORACLE必须分配一片内存区域,这就是上下文区域(context area)...
Which type of cursor runs faster in Oracle? The short answer is thatimplicit cursorsare faster and result in much neater code so there are very few cases where you need to resort to explicit cursors. What is the advantage of cursor in Oracle?
某客户通过 datax 使用 rdbmsreader 读取 ob 数据并以 orc 格式写入到 hdfs 时,当数据量达到400w 时(act_stock_holder),jkd 使用 2g 堆空间都会导致 OutOfMemoryError,需要显示配置 8G 的堆空间才能同步成功,经验证oracle jdk arm 版 1.8.0_381 和 dragonwell jdk arm 版 1.8.0_332 都是如此。OutOfMemo...
Oracle 9 */ create or replace procedure test( p_deptno IN number , p_cursor OUT REFCURSOR_PKG.WEAK8i_REF_CURSOR) is begin open p_cursor FOR select * from emp where deptno = p_deptno; end test; Since Oracle 9i you can use SYS_REFCURSOR as the type for the returning REF_CURSOR. /...
zero or 'setFetchSize()' with a value higher than zero is called on a statement, then the cursor-based result set will be used. Please note that 'useServerPrepStmts' is automatically set to "true" in this case because cursor functionality is available only for server-side prepared ...
[C#] Oracle.DataAccess issue - Unhandled exception of type System.TypeInitializationException occured in mscorlib.dll [C#] Regex - Best Validation of Domain? [C#] Upload pictures with HttpClient - data not sending correctly [C#]conversion from time to double [Help] Get the target path of short...
In this blog, we will see with examples what are the key differences between them and how to improve your code by using features of RAISE. What are the key differences? Oracle’s DBMS_OUTPUT It is an inbuilt package that outputs messages to the...
ORACLE instance shut down. SQL> startup or 2) Create new Rollback segment创建新的回滚段 1 SQL>CreateRollbacksegment <RBS_name> Tablespace <TBS_name> ; Note : Creating rollback segments is allowed in Tablespaces with manual segment space management other wise error ORA-30574 will be Raised ...
How to use the oracle REF CURSOR Oracle Ref Cursors Version 10.2 Strongly Typed 历史上的今天... >>2006-01-09文章: Volume Manager常用命令总结
pgtt is a PostgreSQL extension to create, manage and use Oracle-style Global Temporary Tables and the others RDBMS. The objective of this extension it to provide the Global Temporary Table feature to PostgreSQL waiting for an in core implementation. The main interest of this extension is to mim...