This PostgreSQL tutorial teaches you PostgreSQL from beginner to advanced through many practical and real-world examples.
This tutorial explains the basics of the PostgreSQL stored procedure language in a very friendly way. Many explanations from this document have been extracted from there. The Pl/pgSQL section on the PostgreSQL documentation is a complete and detailed resource by itself, read it to learn all ...
In this tutorial, you will learn how to create new tables in the PostgreSQL database from a C# program.
This tutorial picks up from where the Call PostgreSQL Functions Tutorial left off. Steps for calling a PostgreSQL stored procedure in Python To call a PostgreSQL stored procedure in a Python program, you follow these steps: First, create a new database connection to the PostgreSQL database server...
百度百科是这么描述存储过程的:存储过程(Stored Procedure)是在大型数据库系统中,一组为了完成特定功能的SQL语句集,存储在数据库中,首次编译后再次调用不需要再次编译,用户通过指定存储过程的名字并给出参数(如果有)来执行它。它是数据库中的一个重要对象,任何一个设计良好的数据库应用程序都应该用到存储过程。
In this tutorial you will create a stored procedure and triggers to check a complex constraint. Consider the table definition below: While the unique constraints defined here are sensible, they are not sufficient to express the constraint that a car (identified by its plate) cannot be rented mo...
A stored procedure is a set of structured queries and statements such as control statements and declarations. Here are ten examples of stored procedures that can be useful in different situations. 1. Inserting data using a procedure procedure_demo=#CREATEORREPLACEPROCEDUREgenre_insert_data("GenreId...
Let’s show a practical example of the usage of stored procedures in SQL. 3.1. Practical Example For this demonstration, let’s create a stored procedure that updates the GPA of students in theStudenttable based on their performance in a specific exam: ...
PostgreSQL 11 增加了一个新的模式对象:存储过程(Stored Procedure)。存储过程和函数(Function)类似,不过它没有返回值。 存储过程最大的优势就是能够支持事务控制,也就是可以在定义中使用 COMMIT 或者 ROLLBACK 语句。 使用CREATE\ALTER\DROP PROCEDURE 命令创建\修改\删除存储过程,使用 CALL 命令调用存储过程。支持存...
The xml data type can be used to store XML data. For storing XML data, first you create XML values using function xmlparse. Code: XMLPARSE (DOCUMENT '<?xml version="1.0"?><tutorial>PostgreSQL Tutorial <topics>...</topics></tutorial>') XMLPARSE (CONTENT...