type mysql

PHP tool-type MySQL add, delete, modify, and query tool-type mysql ? Php header ("content-type: text/html; charset = UTF-8 "); class DBUtils {/*** General update method insert update delete operation * @ param SQL * @ return bool true false */public

Mysql numeric data type bitsCN.com Mysql value data type MySQL numeric data types can be roughly divided into two categories: one is an integer, and the other is a floating point or decimal. Many different subtypes are available for each of these

Mysql adds and deletes the field type, mysql Field Add a MySQL field: Alter table 'user _ movement_log 'Add column GatewayId int not null default 0 AFTER 'regionid' (AFTER which field is added) Delete field: alter table `user_movement_log` drop

MySQL floating point type, mysql floating point type MySQL floating-point and fixed-point types can be expressed by the type name plus (M, D). M indicates the total length of the value, and D indicates the length after the decimal point, M and D are

Mysqlfloatdouble type bitsCN.com 1. float typeThe float column type cannot be found by default. the precision must be specified,For example, if num float, insert into table (num) values (0.12); select * from table where num = 0.12, empty set.Num

MySQL field data type MySQL has three types of columns: numbers, strings, and dates. Numeric type The number column type is used to store various numeric data, such as price, age, or quantity. There are two types of numeric columns: integer and

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

Basic mysql Data Type, mysql Data Type Big Data Type Create table data (fti TINYINT, fsi SMALLINT, Fmi MEDIUMINT, fi INT, fbi BIGINT ); Int type Create table data1 (age INT (7 )); Float Type Create table data2 (price FLOAT (5, 2 )); Insert

Mysql Date and Time type, mysql Date and Time Type Current_time display current time now () display current date and time type YEAR 1 byte 1901 ~ 2155 zero value 0000 DATE 4 byte 1000-01-01 ~ 9999-12-31 0 value 0000: 00: 00 TIME 3 bytes-838: 59: 59

Mysqlfloatdouble type 1. float type The float column type cannot be found by default. the precision must be specified, For example, numfloat, insert into table (num) values (0.12); select * from table where num = 0.12, empty set. Num float (0.12),

MySQL: date type, mysql date type 1. datetime (year, month, day, hour, minute, second) Format: 'yyy-MM-DD HH: MM: ss '. Occupied: 8 bytes Range: 1000-01-01 00:00:00 to 9999-12-31 23:59:59. Tip: it can receive dates of any separator, mainly to

1. Numbers: Integral type: tinyinit int bigintThe Tinyinit int bigint, respectively, refers to the different number widths, from the smallest to the largestThere are also int (5) in parentheses after the number, for the deposit is not any

Turn from:Http://www.cnblogs.com/doit8791/archive/2012/05/28/2522556.htmlVariations of the 1.varchar typeThe maximum length of the MySQL database's varchar type is limited to 255 in versions under 4.1, and its data range can be 0~255 or 1~255

Day02One, MySQL indexSecond, MySQL storage engine+++++++++++++++++++++++++++++++++++One, MySQL index1.1 Index Description: Equivalent to "book directory"Page 50001~200 directory informationPhonetic sortingRadical sortStroke sort201~5000 body1.2

Ing between Java data types and MySql Data Types [go], data types mysql Type name Display Length Database Type JAVA type JDBC index (int) Description             VARCHAR L + N VARCHAR

As a new keyword introduced by Sun, Enum looks like a special class. It can also have its own variables, define its own methods, and implement one or more interfaces. When declaring an enum type, we should note that the enum type has the following

First class: integer data bit: bit data type represents 0, 1 or NULL, that is, true, false. 1byte.int: 4 bytes are used to store positive and negative numbers. the storage range is-2 ^ 31 to 2 ^ 31-1.smallint. positive and negative values are stored

Hibernate annotation ing mysql database text type Hibernate @ Lob is usually used together with @ Basic to increase the access speed. @ Lob @ Basic (fetch = FetchType. LAZY) @ Column (name = "DtaContent", columnDefinition = "CLOB", nullable =

Mysql Technology Insider-notes-Chapter 2 data types Chapter 2 data types Do not use UNSIGNED in Mysql as it may bring unexpected results. Show create table tablename/G; view the TABLE creation statement ZEROFILL will automatically

Mysql field type source Web site: http://kimbriggs.com/computers/computer-notes/mysql-notes/mysql-data-types-50.file Type {storage} Name Range Attributes Default Numeric{1 byte} TINYINT [(M)] -From 128 TO 127[0