需要帮助 Mydac TMyquery无法使用此脚本 在navicat和sqlfiddle工作,但tmyquery无法正常工作
SET @@group_concat_max_len = 32000;
SELECT
group_concat(concat('sum(ifnull(if(s.id=',s.id,',m.qty,0),0))`',s.sizes,'`'))eval,
group_concat(concat('i.`',s.sizes,'`'))list
INTO @eval, @list
from(
SELECT DISTINCT s.id, s.sizes
FROM property p
JOIN size_goods s ON s.id=p.id_sizes
WHERE p.id_goods IN (6,7,8)
ORDER BY s.id
)s;
SELECT group_concat(p.id)
INTO @where
FROM property p
WHERE p.id_goods IN (6,7,8)
;
SET @sql=concat_ws(' ',
'select g.id, g.name, g.model,',
@list,',i.Total,i.price,i.cargo_payment,i.Cost from(select p.id_goods id,',@eval,
',sum(ifnull(m.qty,0))Total',
',ifnull(sum(price*qty)/sum(qty),0)price',
',ifnull(sum(cargo_payment*qty)/sum(qty),0)cargo_payment',
',sum(ifnull(m.qty*(m.price+m.cargo_payment),0))Cost',
'from property p',
'join size_goods s on s.id=p.id_sizes',
'left join (',
'select id_property, id_actions, qty*(3-2*id_actions)qty, price, cargo_payment from moves',
') m on m.id_property=p.id',
'where p.id in (',@where,')',
'group by p.id_goods',
')i left join goods g on g.id=i.id;'
);
SELECT @sql;
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;
错误是42000 sql语法最近
答案 0 :(得分:0)
关键是MySQL无法准备这样的SQL语句。您不能使用API调用来准备PREPARE,EXECUTE或DEALLOCATE PREPARE语句。有关详细信息,请参阅http://dev.mysql.com/doc/refman/5.1/en/sql-syntax-prepared-statements.html。 要避免此问题,您应该在不调用TMyQuery.Prepare方法的情况下调用TMyQuery.Open方法。要获取结果值,可以使用AsString属性。这是一个代码示例:
MyQuery.Open;
ShowMessage(MyQuery.Fields[0].AsString);