《Mysql實(shí)例MySql帶參數(shù)存儲(chǔ)過程(動(dòng)態(tài)執(zhí)行SQL語句)》要點(diǎn)：
本文介紹了Mysql實(shí)例MySql帶參數(shù)存儲(chǔ)過程(動(dòng)態(tài)執(zhí)行SQL語句)，希望對(duì)您有用。如果有疑問，可以聯(lián)系我們。
導(dǎo)讀：本文分享的這個(gè)mysql存儲(chǔ)過程是根據(jù)用戶輸入的條件和排序方式查詢用戶的信息,排序條件可以沒有.挪用方式：call GetUsersDynamic(age<=30...
MYSQL教程本文分享的這個(gè)mysql存儲(chǔ)過程是根據(jù)用戶輸入的條件和排序方式查詢用戶的信息,排序條件可以沒有.
MYSQL教程挪用方式：call GetUsersDynamic('age<=30','');
MYSQL教程代碼：
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/********動(dòng)態(tài)查詢用戶的信息********/
CREATE PROCEDURE GetUsersDynamic(WhereCondition varchar(500),OrderByExpress varchar(100))
begin
declare stmt varchar(2000);
if LENGTH(OrderbyExpress)>0 then
begin
???? set @sqlstr=concat('select id,name,password,age,getdate(adddate) as AddDate from users where ',WhereCondition,' order by ',OrderByExpress);
end;
else
begin
???? set @sqlstr=concat('select id,name,password,age,getdate(adddate) as AddDate from users where ',WhereCondition);
end;
end if;
prepare stmt from @sqlstr;
execute stmt;
end;
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MYSQL教程getdate()是一個(gè)自界說的函數(shù),作用是返回日期的短格式
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CREATE DEFINER=`root`@`localhost` FUNCTION `getdate`($date datetime) RETURNS varchar(50) CHARSET latin1
return date_format($date,'%Y-%m-%d');
MYSQL教程動(dòng)態(tài)插入數(shù)據(jù)的存儲(chǔ)過程,(注意四個(gè)單引號(hào)表現(xiàn)一個(gè)一引號(hào))：
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CREATE DEFINER=`root`@`localhost` PROCEDURE `InsertUser`(in name2 varchar(50),in password2 varchar(32),in age2 int,in adddate2 datetime)
begin
DECLARE stmt varchar(2000);
set @sqlstr=concat('insert into users(name,password,age,adddate) values(');
set @sqlstr=concat(@sqlstr,'''',name2,'''',',','''',password2,'''',',',age2,',','''',adddate2,'''',')');
prepare stmt from @sqlstr;
execute stmt;
end;
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MYSQL教程附,另一種帶參數(shù)的形式,在mysql存儲(chǔ)進(jìn)程中動(dòng)態(tài)執(zhí)行sql文.
代碼：
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mysql> PREPARE stmt1 FROM 'SELECT SQRT(POW(必修,2) + POW(必修,2)) AS hypotenuse';
mysql> SET @a = 3;
mysql> SET @b = 4;
mysql> EXECUTE stmt1 USING @a, @b;
mysql> SET @a = 'select * from table1 ';
mysql> SET @b = 'where column1>10 limit 1';
mysql> SET @a = concat(@a,@b);
mysql> PREPARE stmt1 FROM @a;
mysql> EXECUTE stmt1;
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