pl sql examples for practice

Introduction to the Decode () function:Main role: Translation of query results into other values (that is, in other forms of expression, the following examples);How to use:Select decode (ColumnName, value 1, translation value 1, value 2, translation value 2,... Value n, translation value n, default value)From TalbenameWhere ...Where ColumnName is the column defined in the table to be selected,• Explanation of Meaning:Decode (condition, value 1, transl

have defined an empty VARRAY. In the first J loop, 1 is assigned to V_NUM_ARRAY (1), but in fact, there is no storage space for this set variable, therefore, PL/SQL reports an error "the number of tables exceeds the limit. How can we solve this problem? Refer to Oracle's MOS and find the following description: EXTEND Collection Method EXTEND is a procedure that adds elements to the end of a varray or neste

value declare V_gradeChar(1): = ' A '; V_appraisal VARCHAR2 (20); Begin V_appraisal:= --The case does not have to be added, only at the end. CaseV_grade when' A ' then ' excellent ' when' B ' Then ' vary good ' when' C ' Then ' GOOG 'Else' No such grade 'end; Dbms_output. Put_Line (' Grade: ' | | v_grade| | ' Appraisal: ' | |v_appraisal); End CREATE TABLE ower (time date, NAME varchar (NUM Number (2)); DECLARE INT number (2): = 1; BEGIN LOOP INT:= INT +1; INSERT into Ower (time,name,num

PL/SQL Developer Usage Tips1, PL/SQL developer remember login passwordWhen using PL/SQL developer, you want PL/SQL developer to remember the

In the PL/SQL program, we will first retrieve several records from a result set and then process each record, the best practice is to complete it in an SQL statement, but sometimes it may not be implemented because of the requirement. Therefore, we usually define several variables and then perform a loop on the result

; Statement2; ... END LOOP; --for Loop (use a for loops if the number of iterations is known) For counter in [REVERSE] lower_bound. Upper_bound LOOP//counter do not define their own, the system will be directly defined, REVERSE means decrement, or increment, increase or decrease amplitude 1 Statement1; Statement2; ... END LOOP; For example: For I in 1..3 LOOP END LOOP; increase, I do not define For i in REVERSE 1..3 LOOP END LOOPS//minus, pay attention to the back of the range is not to change,

was a problem here, I gave Scott that dbms_pipe permission, forgot to enter the user, directly with the SYS run, and then quitUsing Scott to run is not, error, and then should be used in the time of SYS to create a pipeline, Scott does not use this. Then I changed another name.But why can't I quit ...DECLARE pipename VARCHAR2 (n): = ' signaler1 '; Result INTEGER: = Dbms_pipe.create_pipe (Pipename); BEGIN dbms_pipe.pack_message (' Stop '); end;/This is the one that stopped, but it's not good. Lo

type (each row in its table corresponds to each reference record). Before you can use a piping function, you must write a parallel_enable on the program header so that the pipe function is used in the query statement. 2. How do I make the Pl/sql program wait for some time to execute? 　 The method is to use the sleep function of the Dbms_lock packet, which can be timed accurately with the following synta

information for the entire database that the administrator can access2, display the information of the storage object user_objectsContains a description of the column (English too Simple not translated):Object_name:name of the objectObject_type:type of the object, such as package, FUNCTION, or TRIGGERStatus:status of the Object-valid or INVALIDLast_ddl_time:time stamp indicating the last time this object is changedTake a look at some examples:1) Show

: Network Disk DownloadContent IntroductionEditing the volume of information contained in this book can improve your programming skills to a new level. You'll learn how to write dynamic PL/SQL programs and Oracle database interfaces, perform complex computations, and use advanced techniques to control error conditions. In addition, you will receive up-to-date information on

The Oracle tutorial being looked at is: PL/SQL implementation of Oracle database task scheduling. Absrtact: This article mainly on the database recovery and system task scheduling, combined with the general database background processing experience, put forward a more practical and innovative solutions, broaden the background of the development of the database of ideas. Keywords: data recovery, task schedu

of this program. For obvious reasons, Tomkyte defines this approach as slow and slow processing (slow-by-slow processing). Question 2: Code listing 1-1 's code also has an inherent problem. The SQL statements that are invoked from the PL/SQL loop are repeatedly executed between the PL/

and stores that data in the record. Note that the fields in the record should match the fields in the query results list. SELECT Studentid,firstname,lastnameInto V_studentinfofrom students where studentid=32;2.3 Using %rowtype It is common practice to declare a record in PL/SQL as a database row of the same type. PL/

Backup | program /*ligang1000@hotmail.com*/ feature: Used to back up all Pl/sql objects owned by the current user, including Type,type body, PROCEDURE, FUNCTION, PACKAGE, PACKAGE body or JAVA SOURCE) principle: The call to the User_source data dictionary gets all the pl/sql Code.