A few days ago wrote a procedure, the job then invokes it to fetch the data from the Third-party database through Dblink. Finish the manual run once, all the normal data is also taken, but the next day to work, I found strange phenomenon (note job
Today, we will briefly summarize the usage of cursor in PL/SQL.
Cursor category:
-- Explicit cursor-- Static cursor |
| -- Implicit cursorCursor |-- Strong type (Restriction), specifying the return type-- Dynamic Cursor -- ref cursor |-- Weak type
1. What is a cursor?① Retrieve the result set from the table and point to a record for interaction at a time.② Operations in relational databases are performed on the complete set of rows.The row set returned by the SELECT statement includes all
Oracle Database: PL/SQL cursor overview, oracleplI. cursor Concept
Literally, it refers to a swimming cursor, which is a handle or pointer pointing to the context area.
When performing the CRUD operation in the PL/SQL block, ORACLE allocates a
Basic Oracle cursor and basic oracle cursor
I. cursorThe cursor is used to process the multi-row records retrieved from the database (using the SELECT statement ). With the cursor, the program can process and traverse the entire record set returned
1, what is a cursor? ① retrieves the result set from the table, and the mechanism from which each point points to a record for interaction.The operations in the ② relational database are performed on the complete rowset.The rowset returned by the
Transferred from: http://developer.hi.baidu.com/#/detail/15344654this day's simple summary of the usage of cursor (cursor/cursor) in pl/ SQL.
I believe many DBAs who are engaged in development or maintenance have encountered similar face-to-face
The difference among Cursor, hidden Cursor, and dynamic Ref Cursor is displayed in PLSQL. plsqlref1. Explicit cursorExplicit is relative to implicit cursor, that is, there is a clear declared cursor. The declaration of an explicit cursor is similar
There are two types of cursors in Oracle: an explicit cursor, an implicit cursor. A display cursor is a cursor defined with the cursor...is command that handles multiple records returned by a query statement (SELECT), while an implicit cursor is a
Today, we will briefly summarize the usage of cursor in PL/SQL.
I believe many DBAs who are engaged in development or maintenance have encountered similar face-to-face problems when looking for a job: Please briefly describe the type of the cursor,
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.