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 ...
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...
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...
In this tutorial, you will learn how to create new tables in the PostgreSQL database from a C# program.
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...
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。
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...
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: ...
Database name Authentication method: Integrated Authentication or username and password Are you connecting to an SSL server? (Optional) Initial SQL statement to run every time Tableau connects Driver required This connector requires a driver to talk to the database. If the driver is not installed ...