【发布时间】：2011-04-28 13:41:52
【问题描述】：
只是想知道是否有人可以帮助我理解为什么我的代码没有输出数据。我在 Microsoft SQL Server 2008 中创建了一个 T-SQL 查询。该查询工作正常，并在 SQL 管理工作室中显示所有正确的数据。下面是数据在 SQL Server Management Studio 中的样子：
block sequence|number of ties|percent_of_q4|number of q3 ties|percent of q3 ties| quality
0 1108 11.34296 37 3.33935 1
1 1094 31.11517 66 6.032907 1
2 1109 21.633 53 4.77908 1
当我尝试使用完全相同的查询在简单的 PHP 脚本中输出数据时，没有显示任何数据。
发生这种情况是因为 sqlsrv_query 不喜欢我的查询吗？ sqlsrv_fetch_array 是否不像我的查询中的“IS NOT NULL”？我已经完全没有关于尝试什么的想法了......任何人都可以就为什么这个相当简单的脚本似乎不起作用提供任何建议吗？任何回复将不胜感激！
如果有什么不清楚的地方，请告诉我。
干杯， 尼尔
PHP 脚本如下：
<?php
/*data base connection */
$serverName = ".\SQLEXPRESS";
$connectionOptions = array("Database"=>"V6_HOLLTS479_20101015_subset",
"UID"=>"username",
"PWD" => "password");
/* Connect using Windows Authentication */
$conn = sqlsrv_connect($serverName, $connectionOptions);
/* Check whether connnection is established */
if($conn === false)
{
die(print_r(sqlsrv_errors(), true));
}
/* SQL query */
$tsql = "
DECLARE @block_size AS real
DECLARE @threshold_1 AS real
DECLARE @threshold_2 AS real
DECLARE @threshold_3 AS real
DECLARE @threshold_4 AS real
--Set variables
SET @block_size = 200.0
SET @threshold_1 = 50 -- GISCat4HighThresh
SET @threshold_2 = 75 -- GISCat3HighThresh
SET @threshold_3 = 25 -- GISCat4LowThresh
SET @threshold_4 = 50 -- GISCat3LowThresh
SELECT
sub_t.block_sequence ,
sub_t.number_of_ties,
tie_q_4.number_of_ties AS number_of_q4_ties,
(CAST(tie_q_4.number_of_ties AS real)/CAST(sub_t.number_of_ties AS real))*100.0 AS percent_of_q4_ties,
tie_q_3.number_of_ties AS number_of_q3_ties,
(CAST(tie_q_3.number_of_ties AS real)/CAST(sub_t.number_of_ties AS real))*100.0 AS percent_of_q3_ties,
--The next column shows the block quality. This is currently 4,3,1 based on the threshold rules.
CASE WHEN (
(CAST(tie_q_4.number_of_ties AS real)/CAST(sub_t.number_of_ties AS real))*100.0 > @threshold_1
OR
(CAST(tie_q_3.number_of_ties AS real)/CAST(sub_t.number_of_ties AS real))*100.0 > @threshold_2
) THEN 4
WHEN (
(CAST(tie_q_4.number_of_ties AS real)/CAST(sub_t.number_of_ties AS real))*100.0 > @threshold_3
OR
(CAST(tie_q_3.number_of_ties AS real)/CAST(sub_t.number_of_ties AS real))*100.0 > @threshold_4
) THEN 3
ELSE 1
END AS quality
FROM (
SELECT
FLOOR(CAST(image_sequence AS real)/@block_size) AS block_sequence ,
COUNT(image_sequence) AS number_of_ties
FROM database
GROUP BY
FLOOR(CAST(image_sequence AS real)/@block_size)
) AS SUB_T
LEFT JOIN (
SELECT FLOOR(CAST(image_sequence AS real)/@block_size) AS block_sequence ,
COUNT(image_sequence) AS number_of_ties
FROM database
WHERE
quality = 4
GROUP BY
FLOOR(CAST(image_sequence AS real)/@block_size)
) AS tie_q_4 ON sub_t.block_sequence = tie_q_4.block_sequence
LEFT JOIN (
SELECT
FLOOR(CAST(image_sequence AS real)/@block_size) AS block_sequence ,
COUNT(image_sequence) AS number_of_ties
FROM database
WHERE
quality = 3
GROUP BY
FLOOR(CAST(image_sequence AS real)/@block_size)
) AS tie_q_3 ON sub_t.block_sequence = tie_q_3.block_sequence
WHERE sub_t.block_sequence IS NOT NULL
ORDER BY block_sequence
";
$result = sqlsrv_query($conn, $tsql);
$row = sqlsrv_fetch_array($result, SQLSRV_FETCH_ASSOC);
print("<pre>");
print_r($row);
print("</pre>");
【问题讨论】：
标签： php sql-server sql-server-2008