in set (0.00 sec) mysql> insert into decimal_tb (col2) values (9999); ERROR 1264 (22003): Out of range value for column 'col2' at row 1 mysql> insert into decimal_tb (col2) values (12.233); Query OK, 1 row affected, 1 warning (0.01 sec) mysql> show warnings; +---+---+...
首先遇到问题,第一想到的就是官方找答案,我们翻阅官方文档,关于float和double有这样一段描述 For FLOAT, the SQL standard permits an optional specification of the precision (but not the range of the exponent) in bits following the keywordFLOAT in parentheses. MySQL also supports this optional precision ...
MySQL的数值数据类型支持SQL标准的数值类型,其中包括精确数值数据类型(INTEGER, SMALLINT, DECIMAL)和近似数值数据类型(FLOAT, REAL, and DOUBLE) 1.1精确整数数值类型 MySQL支持SQL标准的 INTEGER (or INT) 和SMALLINT,同时也支持非SQL标准的 TINYINT, MEDIUMINT和BIGINT。各数据类型需要存储空间(字节)以及取值范围见...
具体decimal类型运算参考信息中心如下: Decimalarithmetic in SQL The following formulas define the precision and scale of the result ofdecimaloperations in SQL. The symbolspandsdenote the precision and scale of the first operand, and the symbolsp' ands' denote the precision and scale of the second ...
This limit of 65 digits of precision also applies to exact-value numeric literals, so the maximum range of such literals differs from before. (There is also a limit on how long the text of DECIMAL literals can be; see Section 12.25.3, “Expression Handling”.) 以上材料提到的最大精度和...
update_query =f"UPDATE{table_name}SET double_col = double_col * 1.0000000001 WHERE id % 4 = 0;"total_time =0for_inrange(num_trials): start_time = time() cursor.execute(update_query) cnx.commit() total_time += time() - start_timereturntotal_time / num_trials, total_time# 返回平...
1 rows in set (0.00 sec) 之后执行 SQL 语句 update t20200709 set name =1 where id = 1;mysql> update t20200709 set name =1 where id = 1; Query OK, 1 row affected (0.00 sec) Rows matched: 1 Changed: 1 Warnings: 0 然后来看下 Binlog 中的记录:#200715 17:28:28 server id 15218...
Fayson今天在Hive中插入字段类型为decimal的数据时发现,插入数据为1.0, 1.000等以 .0结尾的数据在hive中显示为1,即不显示末尾的.0 ,如下:
The range of values for precision and scale is different for each vendor: Examples Let’s see some examples of creating an SQL DECIMAL data type, including how to insert data into a decimal and how to select data. Example 1: Create Table with Decimal ...
不定义fload, double的精度和标度时,存储按给出的数值存储,这于OS和当前的硬件有关。decimal默认为decimal(10,0)因为误差问题,在程序中,少用浮点数做=比较,可以做range比较。如果数值比较,最好使用decimal类型。精度中,符号不算在内: AI检测代码解析