WebApr 9, 2013 · My understanding of the terms is: - Duration: time taken for query to fully execute on server (not affected by things like network latency/speed) - Fetch: time taken for data to fully transfer to client (Affected by things like network latency/speed) This does not appear to be the case in 5.2.47 WebWhen you run a query in MySQL Workbench you get actually 2 times in the action output window. The headeing also shows what they are for: There's the execution time on the server (which is probably your ~16s) and the, usually much larger, fetch time, to transport the data from the server to the client.
Ten ways to increase MySQL query speed and …
WebNov 15, 2010 · First, all we did was subtract the start date from the end date to calculate the duration. You can only do that with the DATETIME and SMALLDATETIME data-types. It doesn’t work for any of the ... WebDec 21, 2016 · Getting the current time in MySQL . Before we look at the alternative approach, let’s consider how we get the current time in MySQL. Several date functions address time. By default, MySQL uses the local system time zone. Therefore calling the function NOW() will retrieve the current time in whatever time zone the server is set. dji-group
MySQL : mysql duration and fetch time - YouTube
WebApr 12, 2024 · 对于习惯使用SQL的用户而言,Elasticsearch的查询API是完全陌生的一套体系,复杂查询非常难写。. Elasticsearch的搜索引擎支持三种不同模式的搜索方式:query_and_fetch,query_then_fetch,dfs_query_then_fetch。. 第一种模式很简单,每个分布式节点独立搜索然后把得到的结果 ... WebApr 2, 2024 · Duration is the time Workbench takes to retrieve the first row of the result set. Fetch is the time it takes to retrieve the rest of the rows. It looks like both queries take … WebOct 15, 2007 · Typically, for durations that spans hours, seconds are as accurate as you need to be. (Plus, the DateTime data type is only accurate to a 1/300th of a second anyway, not a true millisecond.) A handy function, DateDiff (), can return for any two the dates the difference in any specific unit that we wish -- hours, seconds, minutes, and so on. c语言输出字符串