❮ Previous ❮ MySQL Functions Next ❯ ExampleGet your own SQL Server Return a number truncated to 2 decimal places: SELECT TRUNCATE(135.375, 2); Try it Yourself » Definition and UsageThe TRUNCATE() function truncates a number to the specified number of decimal places....
MySQL TRUNCATE() returns a number after truncated to a certain decimal places. The number and the number of decimal places are specified as arguments of the TRUNCATE function.
create or replace function sys.truncate(numeric,int4) returns numeric as declare value numeric; result numeric; begin value := length(substring(cast($1 as varchar), position('.' in cast($1 as varchar))+ 1)); if value < $2 then return $1; else return (select trunc($1,$2)); end...
(The value of 35 comes from how the UNDO logs (rollback segments or rsegs) are allocated—0: REDO enabled rseg allocated in the system tablespace, 1-32: non-REDO enabled rsegs allocated in the temporary tablespace, 33-n: REDO enabled rsegs allocated in UNDO tablespaces) How It Works Pr...
一、为什么要使用truncate 使用truncate截断表速度快,不仅可以清空表数据,而且可以使自增列重新从1开始 二、出现错误的原因 Mysql中如果表和表之间建立了外键约束,则无法删除表及修改表结构 三、解决方案 在Mysql中取消外键约束: SET FOREIGN_KEY_CHECKS=0 ...
来自专栏 · MySQL自学笔记 场景 在删除数据表中数据时, truncate table app04news_userinfo; 报错如下: ERROR 1701 (42000): Cannot truncate a table referenced in a foreign key constraint (`platform`.`app04news_news`, CONSTRAINT `app04news_news_user_id_d2929af9_fk_app04news_userinfo_id`) 问题...
MySQL in a Nutshell by Russell J. T. Dyer Name TRUNCATE( ) Synopsis TRUNCATE(number, number) This function returns a number given in the first argument with the digits beyond the number of decimal places specified in the second argument, truncated. It does not round the number—use the ...
The MySQL Reference Manual says "The return type is the same type as that of the first argument (assuming that it is integer, double, or decimal)." http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html#function_round In this sentence "type" means integer or double or ...
After truncation takes place the new entry has an ID of 11. After truncation I would expect that the ID would be 1.Why that happens This is the DDL for the table in question: CREATE TABLE `appointments` ( `apID` int(11) NOT NULL AUTO_INCREMENT, ...
Re: TRUNCATE in AccessPosted by: Doug Lourey Date: September 07, 2007 11:38AM Create a procedure in MySql similar to the following: DELIMITER $$ DROP PROCEDURE IF EXISTS 'myshema'.'truncate_table' $$ CREATE PROCEDURE 'truncate_table'() begin truncate 'mytable'; END $$ ...