cursor syntax in oracle

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

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

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

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

I. Classification of Cursors The Oracle database provides two types of cursors, static and dynamic, while static cursors are divided into hermit cursors and explicit cursors, and dynamic cursors are classified as weak and strongly typed. Second,

Cursor is a complex concept in the database field, because it contains shared cursor and session cursor. The two have different concepts and forms.The concept of shared cursor is easy to confuse with the cursor defined in SQL statements. This

1. Cursor conceptLiterally, 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 context zone for it in the memory. The database language

SQL is the language used to access the Oracle database. PL/SQL expands and enhances SQL functions. It also introduces stronger Program Logic. PL/SQL supports DML commands and SQL transaction control statements. DDL is not supported in PL/SQL, which

SQL is the language used to access the Oracle database. PL/SQL expands and enhances SQL functions. It also introduces stronger Program Logic. PL/SQL supports DML commands and SQL transaction control statements. DDL is not supported in PL/SQL, which

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