how to check cursor empty in oracle

Using data block to operate Oracle yesterday, cursor is returned. A problem occurred during this period. It was very depressing and it was not solved after I found it all afternoon. You can't sleep in the morning. The solution is found. In fact, it

In the previous post, I answered some questions from some netizens about how to wear a stored procedure that returns a set of records. I think many netizens already understand this. I will not talk about it more here. How to call a stored procedure

Oracle-based SQL Optimization MethodologyThe ultimate goal of SQL Optimization in Oracle databases is to shorten the execution time of target SQL statements. To achieve the above purpose, we usually have the following three methods to choose from:1.

ORA-00001: violation of unique constraints (.) ORA-00017: Request session to set trace event ORA-00018: exceeds Max sessions ORA-00019: exceeds Max session licenses ORA-00020: exceeds Max processes () ORA-00021: Session is attached to some other

Oracle CBO RBO Detailed url:http://blog.163.com/love-love-l/blog/static/21078304201010175035270/ Http://blog.csdn.net/cnham/archive/2010/04/13/5482318.aspx First part What is Table analysis. Simply put, it is the information that collects tables

I. Introduction of row migration and row link in actual work we often encounter some problems with low Oracle database performance. Of course, there are many reasons that cause low Oracle database performance, we can use some correct design and

The difference between Oracle and MySQL 1. is a large database and MySQL is a small and medium-sized database, Oracle market share of 40%,mysql only about 20%, while MySQL is open source and Oracle price is very high Oracle. 2. Oracle supports large

From: http://www.oracle.com/technetwork/cn/articles/dsl/prez-python-queries-101587-zhs.html In the core principles of Python's way of doing things, there is a requirement to have an advanced interface to the API. The database API (in this case, the

Collect statistics from ORACLE Link: http://blog.itpub.net/2317695/viewspace-1226138/Today, I saw an article on Statistics Collection on the Internet, which is not bad. 1. Understand what is statistical information Optimizer statistics are a set of

Author: skateWhen a performance bottleneck occurs in the system, try to consume as few unnecessary resources as possible. The last step is to balance CPU, memory, Io, network and other resources so that the databaseIt can run stably. Oracle Database