sql query to get last 1 hour data

Ø Basic Common Query --select SELECT * from student; --all Query All Select all sex from student; --DISTINCT Filter Repeat Select distinct sex from student; --count Statistics Select COUNT (*) from student; Select count (Sex) from student; Select

The DateDiff () function and the GETDATE () function are needed when you are doing SQL Server development and sometimes need to get the data in the table today, yesterday, this week, last week, this month, and last month. DATEDIFF (DatePart,

What You Should Know About SQL Injection Put on your black hat. Now let's learn something really interesting about SQL injection. Please remember, you all use these things to be seen well, OK? SQL injection attacks are a particularly interesting

1. Use the Set NOCOUNT on option:By default, each time a SQL statement is executed, a message is sent from the server to the client to display the number of rows affected by the SQL statement. This information is rarely useful to clients. By turning

  Adopt flexible and effective methods to plan, design, and implement Basic Data Warehouse solutions based on IBM DB2 Data Warehouse Edition. Part 1 of this series will focus on the customer interaction process and plan data warehouse projects ......

First, use Select to retrieve dataData query is the central content of SQL language, the function of the SELECT statement is to allow the database server to retrieve the required information according to customer requirements, and in accordance with

Data operation date and time Date and time functions are useful for building a site. The owner of the site is often interested in when the data in a table is updated. With date and time functions, you can track changes in a table at the millisecond

MySQL Database Basics (iii)--sql Language I. Introduction to SQL 1. Introduction to SQL languageSQL is a Structured Query language (structured Query Language), which is the standard computer language for accessing and working with databases.The

　　SQL statement gets a specific date 1. The first day of one months Select DATEADD (mm, DATEDIFF (Mm,0,getdate ()), 0) 2. Monday of this week Select DATEADD (wk, DATEDIFF (Wk,0,getdate ()), 0) 3. The first day of the year Select DATEADD (yy,

The evolution of the Apache Kylin Big data analytics PlatformExt.: http://mt.sohu.com/20160628/n456602429.shtmlI am Li Yang from Kyligence, co-founder and CTO of Shanghai Kyligence. Today I am mainly here to share with you the new features and