In thePL SQL Operators And Control Statements Tutorialof thePL/SQL series, we learned about different PL SQL Operators and Control Statements like if-then-else, for loop, while loop, etc. with sample code examples. In this article, we will discuss the subprograms that PL/SQL supports. Also,...
PL/SQL Procedures - Learn how to create and manage PL/SQL procedures with examples. Master the use of procedures in PL/SQL to improve your database programming skills.
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In eitherenvironment, the PL/SQL engine accepts as input any valid PL/SQL unit. Theengine runs procedural statements, but sends SQL statements to the SQL enginein the database, as shown in Figure1-1. --PL/SQL 引擎接收任何有效的PL/SQL 单元,然后执行里面的过程语句,但是对于SQL...
Examples of PL/SQL features include cursors, embedded PL/SQL and calling a stored procedure. Cursors act as pointers to the context area. A PL/SQL block uses a cursor to control the context area. Cursors can remain unnamed or anonymous, but named cursors make retrieval easier. Cursors can ...
See the execution plan for a SQL statement (EXPLAIN PLAN) Lock a table or view, temporarily limiting other users' access (LOCK TABLE)DML statements are the most frequently used SQL statements. Some examples of DML statements are:SELECT last_name, manager_id, commission_pct + salary FROM emplo...
A cursor references a result set. The REF CURSOR allows you to pass a cursor reference from one PL/SQL program unit to another. In other words, it allows you to create a variable that will receive a cursor and enable access to its result set,but in this blog I am giving examples for...
Now let’s try some examples which will help you understand the concepts more clearly. Input 1: DECLARE BEGIN FOR vc IN 1..7 LOOP DBMS_OUTPUT.PUT_LINE(vc); END LOOP; END; Output: Explanation: This is a very simple demonstration of the PL-SQL program. So, here we have DECLARE BEGIN...
PL/SQL program unitsgenerally are categorized as follows: (1)A subprogram is a PL/SQLblock that is stored in the database and can be called by name from anapplication. When you create a subprogram, the database parses the subprogramand stores its parsed representation in the database. You...
Also, the PL/SQL compiler imposes various limits, some of which are given inTable E-1. Ordinarily, however, the DIANA size limit is exceeded before any of those limits. To estimate how much memory a program unit requires, you can query the data dictionary viewuser_object_size. The column...