sql pl sql tutorial pdf

The PL/SQL cursor provides a way for a program to select multiple rows of data from a database and then handle each row separately, providing Oracle with a means to indicate and control the stages of SQL processing. I will think you have a certain understanding of pl/sql. Th

first,. Basic Syntaxthe structure block for PL/SQL is as follows:Declare--declaring variables, types, cursorsBegin--part of the program execution, similar to the Main methodexception--a mechanism for how to deal with exceptions--when ....EndNote that there is no use of the part, there is no need to write, such as the program is really no exception to deal with, then exception will not writerecommended namin

Label:PL/SQL exception handling for Oracle databaseExceptions are abnormal events that occur during the course of a program's operation, usually caused by hardware problems or programming problems. Even the best-written programs may encounter errors or unanticipated events during the PL/SQL programming process. A robust program should be able to properly handle v

I. PL/SQL tableThe PL/SQL table has only two columns, where the first column is listed as an integer type and the second column is the user custom.Defined:TYPE is TABLE of Types of [Not NULL] INDEX by Binary_integer;The type of Property Method:. Count-Returns the total number of rows in a

Difference between % TYPE and % ROWTYPE in PL/SQL, % type % rowtype % TYPE: Defines a variable. Its data type is the same as that of a defined data variable or the data type of a column in a database table.In this case, % TYPE can be used.The advantages of using the % TYPE feature are: 1. You do not need to know the Data Type of the referenced database column;2. The data type of the referenced database colu

DB2 respectively. (I don't know what the situation is. After the configuration is completed, one HOST in tnsnames. ora is the IP address, and the other is my HOST name .) As a result, PL/SQL of DB1 is connected normally (because the IP address exactly matches the HOST address of listener. ora), while PL/SQL of DB2 pro

MySQL, MariaDB, SQL Server, SQLite, Oracle, and PostgreSQL databases in a single program. The official website is: Http://www.navicat.com.cn/products/navicat-premium. Since this machine is a 64-bit operating system, download the latest 11.1.10 64-bit version. 3, Pl\sql Developer 10.0.5.1710 PL/

PL/SQL Developer Quick action: show invisible characters Display historical SQL statements copy entire statements of the Windows to a new SQL windowDisplay invisible characters: You can display the blank space, carriage return;Show History SQL statement: Ctrl+e, not only con

PL/SQL1. Procedures, functions, and triggers are written in PL/SQL2, procedures, functions, triggers are stored in the Oracle database3. PL/SQL is a very powerful process language4, procedures, functions, triggers can be called in a Java programPL/SQL Writing can save a litt

In the oracle development environment, we can use the dbms_lob package for processing! Dbms_lob package is powerful and simple to use. It can be used to read internal lob objects or to process B In the oracle development environment, we can use the dbms_lob package for processing! Dbms_lob package is powerful and simple to use. It can be used to read internal lob objects or to process B The ORA-06502: PL/SQL