同时,我们会展示两个图表:一个旅行图和一个实体关系图,帮助读者更好地理解整个概念。 1. Understanding Decimal Type in MySQL 在MySQL中,DECIMAL类型用于存储精确的小数数值,其语法为DECIMAL(M,D),其中M表示数字的总位数,而D则是小数点后面的位数。例如,DECIMAL(5,2)可以存储范围从-999.99到999.99的数值。 2. ...
总结 在MySQL存储过程中,使用decimal类型的参数可以确保计算结果的准确性。通过定义合适的精度和范围,我们可以处理和存储各种十进制数值,包括金融、货币等涉及精确计算的场景。在编写存储过程时,我们需要注意参数的位数和小数点后的位数,以确保计算结果的准确性。 希望本文对你理解MySQL存储过程中的decimal类型参数有所帮助。
DECIMAL Data Type In MySQL,DECIMAL(M,D)andNUMERIC(M,D)are the same, and both have a precision of exactlyMdigits. Leftover Digits Number of Bytes001–213–425–637–94 For example, aDECIMAL(18,9)column has nine digits on either side of the decimal point, so the integer part and the ...
This section discusses the characteristics of theDECIMALdata type (and its synonyms), with particular regard to the following topics: Maximum number of digits Storage format Storage requirements The nonstandard MySQL extension to the upper range ofDECIMALcolumns ...
mysql> CREATE TABLE `tc_integer` ( `f_id` bigint(20) PRIMARY KEY AUTO_INCREMENT, `f_type` tinyint, `f_flag` tinyint(1), `f_num` smallint(5) unsigned ZEROFILL ) ENGINE=InnoDB DEFAULT CHARSET=utf8; mysql> desc tc_integer; ...
先来看看 MySQL decimal 相关的数据结构 typedefint32decimal_digit_t;structdecimal_t{intintg, frac, len;boolsign;decimal_digit_t*buf; }; AI代码助手复制代码 MySQL 的 decimal 使用一个长度为 len 的 decimal_digit_t (int32) 的数组 buf 来存储 decimal 的数字, 每个 decimal_digit_t 最多存储 9 ...
decimal type issue Posted by:Anthony Nelson Date: October 25, 2016 11:08PM I'm running mysql 5.6.29 and I'm getting an unexpected result when I attempt to create a field in a table of type decimal(3,1). I don't know if it matters, but I am using phpmyadmin to create the table...
in bits following the keywordFLOAT in parentheses. MySQL also supports this optional precision specification, but the precision value is used only to determine storage size. A precision from 0 to 23 results in a 4-byte single-precision FLOAT column. A precision from 24 to 53 results in an 8...
2 rows in set (0.01 sec) mysql> desc temp2; +---+---+---+---+---+---+ | Field | Type | Null | Key | Default | Extra | +---+---+---+---+---+---+ | id | float(10,2) | YES | | NULL | | | id2 | double(10,2) | YES | | NULL ...
mysql> CREATE TABLE `tc_integer` ( `f_id` bigint(20) PRIMARY KEY AUTO_INCREMENT, `f_type` tinyint, `f_flag` tinyint(1), `f_num` smallint(5) unsigned ZEROFILL ) ENGINE=InnoDB DEFAULT CHARSET=utf8; mysql> desc tc_integer; ...