MySQL常用指令,java,php程序员,数据库工程师必备。程序员小冰常用资料整理MySQL common commands (for reference)The most common display commands are:1. Display the list of databases.show databases;2. Display the data table in the library:Use MySQL;Show tables;3, display the
MySQL date data type and time type usage summary MySQL date type: Date format, storage space occupied, date range comparison.
Date type storage space date format date range
-----------------------------------------------------------------------------
MySQL date type: Date Format, storage space occupied, and date range comparison.Date type storage space date format date range-----------------------------------------------------------------------------------Datetime 8 bytes YYYY-MM-DD hh: mm: SS 10
A. Numeric type
MySQL supports numeric types in all standard SQL, including strict data types (integer,smallint,decimal,numberic), and approximate numeric data types (float,real,double presision). And on this basis to expand.
After the expansion,
1. Integral type
MySQL data type
Meaning (Signed)
tinyint (m)
1 byte range ( -128~127)
smallint (m)
2 byte range ( -32768~32767)
Mediumint (M)
3 byte range ( -8388608~8388607)
MYSQL getting started 4: MYSQL data type bitsCN.com
MYSQL entry 4: MYSQL data types
Related links:
MYSQL: Basic operations
Http: // database/201212/173868 .html
MYSQL 2: use regular expressions to search
Http: // database/201212/173869 .html
MYSQL
Turn from:http://blog.chinaunix.net/space.php?uid=11327712&do=blog&id=32416MySQL Date Type: Date format, occupied storage space, date range comparison.Date type storage space date format date range-----------------------------------------------------
Henan College of Traditional Chinese Medicine
Course Design Report of MySQL Database Management
Title: Research and Implementation of MySQL Clusters
Completion date:2012January 1, December 31
Contents
1. Course Design overview 3
2. research
Numeric typeMySQL supports all numeric types in standard SQL, including strict data types, INTEGER,SMALLINT,DECIMAL, NUMBERIC as well as approximate numeric data types FLOAT,REAL,DOUBLE PRESISION , and expands on this basis. This extension adds
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.