mysql>create tablef2(f1float(15,2));QueryOK,0rowsaffected(0.01sec)mysql>insert into f2values(123456789.39);QueryOK,1rowaffected(0.00sec)mysql>select*from f2;+---+|f1|+---+|123456792.00|+---+1rowinset(0.00sec) 最后你会发现,连整数都不准了,小数被完全抹去了。 第二个误区,对于存储而言,是...
in set (0.00 sec) mysql> insert into decimal_tb (col2) values (12.2300); Query OK, 1 row affected (0.01 sec) # 变量范围测试 # 结论:M范围是1到65,D范围是0到30,且D不大于M mysql> alter table decimal_tb add column col3 decimal(6,6); Query OK, 0 rows affected (0.12 sec) ...
mysql> insert into decimal_tb (col2) values (12.2300); Query OK, 1 row affected (0.01 sec) # 变量范围测试 # 结论:M范围是1到65,D范围是0到30,且D不大于M mysql> alter table decimal_tb add column col3 decimal(6,6); Query OK, 0 rows affected (0.12 sec) Records: 0 Duplicates: 0 ...
I can store decimal numbers in my current ISAM tables as they are. I have no problem doing that (I have dozens of tables and columns and have no problem storing decimal values in those tables/columns, including the fractional portion). By the way, I have dropped and re-created the table...
DELIMITER$$CREATEPROCEDUREAddProduct(INprod_nameVARCHAR(255),INprod_priceDECIMAL(10,2)DEFAULT0.00)BEGININSERTINTOproducts(name,price)VALUES(prod_name,IFNULL(prod_price,0.00));END$$DELIMITER; 1. 2. 3. 4. 5. 6. 7. 8. 4. 定期进行数据审查 ...
mysql>insertintodecimal_tb (col2)values(12.2300); Query OK,1rowaffected (0.01sec) # 变量范围测试 # 结论:M范围是1到65,D范围是0到30,且D不大于M mysql>altertabledecimal_tbaddcolumncol3decimal(6,6); Query OK,0rowsaffected (0.12sec) ...
VALUES ('Bicycle', 500.34), ('Seat', 10.23), ('Break', 5.21); 第三步,从test_order表查询数据。 SELECT* fromtest_order 第四步,更改cost列以包含ZEROFILL属性。 ALTER TABLE test_order MODIFY COLUMN cost DECIMAL(19, 4) ZEROFILL; 第五步,再次查询test_order表。
mysql> create table temp2(id float(10,2),id2 double(10,2),id3 decimal(10,2)); Query OK, 0 rows affected (0.18 sec) mysql> insert into temp2 values(1234567.21, 1234567.21,1234567.21),(9876543.21, -> 9876543.12, 9876543.12); Query OK, 2 rows affected (0.06 sec) ...
(0.03 sec)mysql>mysql> select * from temp2;+---+---+| id | id2 |+---+---+| 1.235 | 1.235 |+---+---+1 row in set (0.00 sec)mysql> insert into temp2 values(3.3,4.4);Query OK, 1 row affected (0.09 sec)mysql> select * from temp2;+---+---+| id | i...
[in,out]fieldthe field to save the item into no_conversionswhether or not to allow conversions of the value Returns the status from saving into the field Return values TYPE_OKitem saved without any errors or warnings !=TYPE_OK there were errors or warnings when saving the item ...