The documentation on the trigger procedure (https://www.postgresql.org/docs/9.6/static/plpgsql-trigger.html) says: “The trigger function must return NULL or Record/row”.
example
CREATE
Month: August 2021
ASCII 152 Character (“ÿ”) PostgreSQL upper layer function
On the Windows 7 platform, use PostgreSQL version 9.3.9, use PgAdmin as the client, select the upper result “ÿÿÿ” on the column containing the example, and return null. If you store three Values, f
3, ReactJS, JSX, Component Features
reactjs features:
p> 1. Component-based thinking
[Composition] The most basic unit of React is Component. Each component can also contain more than one sub-component, which can be assem
18, incremental crawler
Introduction: When we browse related webpages, we will find that some websites will regularly update a batch of data on the basis of the original webpage data, for example, a movie website will up
Fastfdfs with nginx
fastfdfs with nginx
1 # Connection timeout
2 connect_timeout=10
3
4 # Tracker Server
5 tracker_server=Tracker Server ip and port number
6
7 # StorageServer default port
8 storag
HDU 1542 STARS [tree array] [data structure]
Subject link: http://acm.hdu.edu.cn/showproblem.php?pid=1541
———————–.
Stars
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 8916 A
EFCORE Method for performing SQL statements: Fromsql and ExecuteSQLCommand
Preface The methods of executing Sql statements in EFCore are: FromSql and ExecuteSqlCommand; in EF6, SqlQuery and ExecuteSqlCommand, and FromSql and SqlQuery are very different, and the return val
234. Copyright
Question link: https://leetcode-cn.com/problems/palindrome-linked-list/submissions/
Question-solving ideas: Cut in half, reverse the second half, and compare whether the two halves are equal.
ASP.NET ExpressionBuilder Syntax – Output Appsetting in IMG tag
I want to use ASP.NET’s ExpressionBuilder syntax to dynamically retrieve the domain of static content from AppSetting.
I use the following syntax, which does not work:< /p>
/img/logo.jp
# 20182333 2019-2020 “Data Structure and Object Design” Experiment 5 Report
20182333 2019-2020-1 “Data structure and object-oriented programming” experiment 5 report Course: “Program design And data structure”
Class: 1823
Name: Qian Jiayu
Student ID: 2018