1 SELECT SUM(DATA_LENGTH)+SUM(INDEX_LENGTH) FROM information_schema.tables WHERE TABLE_SCHEMA='database_name'; 结果是以字节为单位,除1024为K,除1048576为M. SELECT TABLE_NAME,DATA_LENGTH+INDEX_LENGTH,TABLE_ROWS FROM information_schema.tables WHERE TABLE_SCHEMA='…
原文地址:http://www.javacodegeeks.com/2015/07/mysql-vs-mongodb.html 1. Introduction It would be fair to say that as IT professionals we are living in the golden age of data management era. As our software systems become more complex and more distributed,…
I’m going to go over some methods to import data from text files into SQL Server today. The particular file I went out and grabbed is comma delimited and with a few qualifiers in it. It is a typical file you may get and a request made to import or ju…
LOAD DATA [LOW_PRIORITY | CONCURRENT] [LOCAL] INFILE 'file_name.txt' [REPLACE | IGNORE] INTO TABLE tbl_name [FIELDS [TERMINATED BY 'string'] [[OPTIONALLY] ENCLOSED BY 'char'] [ESCAPED BY 'char' ] ] [LINES [STARTING BY 'string'] [TERMINATED BY 'string…
What is Spark Apache Spark is a cluster computing framework, similar to Apache Hadoop. Wikipedia has a great description of it: Apache Spark is an open source cluster computing framework originally developed in the AMPLab at University of California,…
Week 1 Data Science: An overview Objective: 1.Is data science the same as statistics or analysis? statistics analysis data science statistical analysis *analyzing the information of a sample. statistical analysis allowed to draw inference about targe…