行PHP PDO中的MSSQL查询

Question

I've been trying to get this query working for far too long now, and I figured it was time to ask for help. I'm currently trying to query a MSSQL database from a PHP script using the PDO connection type. I'm trying to get all contents from the rows between certain values (here it's 100 and 200). This is the query I'm trying to run.

SELECT TOP 100 Id, CreateDate, cast(XmlBody as varchar(max))
as XmlBody, ObjectType, Tag, Name
FROM Table WHERE ObjectType LIKE 'StaffPersonal' AND BETWEEN 100
AND 200

I typically use MYSQL, so I'm a little lost on the proper syntax for MSSQL (the LIKE keyword was a brutal lesson). This query is throwing a general syntax error.

exception 'PDOException' with message 'SQLSTATE[HY000]: General error: 156 General SQL Server error: Check messages from the SQL Server [156] (severity 15)

I'm not sure what's causing this error, but it's driving me crazy. Thanks in advance for the help, it is truly appreciated.

Answer 1

If I understand it correctly and you are trying to get the records 100 to 200 from the bigger recordset. You can use the below statement.

SELECT * FROM ( SELECT ROW_NUMBER() OVER ( ORDER BY Id ) AS RowNum, Id, CreateDate, cast(XmlBody as varchar(max)) as XmlBody, ObjectType, Tag, Name FROM Table WHERE ObjectType = 'StaffPersonal' ) AS RowConstrainedResult WHERE RowNum >= 100 AND RowNum < 201 ORDER BY RowNum

Above query uses a subquery and assigns Row numbers based on the Id field (ordered by Id) then filters the result set for the Row numbers 100 to 200.

You can also use the below where statement if you want to use BETWEEN operator

WHERE RowNum BETWEEN 100 AND 200 

Between requires a field before it. In this case you need the ROW_NUMBER() function to give you that. I also changed the LIKE to = to make it more efficient since you were looking for exact match.

To try the simplified version on SQLFiddle

Table and data creation

CREATE TABLE supportContacts 
(
 id int  primary key, 
 type varchar(20), 
 details varchar(30)
);

INSERT INTO supportContacts
(id, type, details)
VALUES
(1,'Email', 'admin@sqlfiddle.com'),
(2,'Twitter', '@sqlfiddle'),
(3,'Twitter2', '@sqlfiddle'),
(4,'Twitter3', '@sqlfiddle');

And select query

SELECT  *
FROM    ( SELECT    ROW_NUMBER() OVER ( ORDER BY Id ) AS RowNum, Id, type, details
      FROM      supportContacts
      WHERE     type = 'twitter'
    ) AS RowConstrainedResult
--WHERE   RowNum >= 1
--    AND RowNum < 2
WHERE RowNum BETWEEN 1 AND 2 
ORDER BY RowNum