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I need to count students by very hard parameter, and idk how to do it

on the internet i find only very few info about count in ms access
there is query string
"SELECT students.Student FROM specialty INNER JOIN (groups INNER JOIN
((mark INNER JOIN students ON mark.idstudent = students.IDstudent)
INNER JOIN miss ON students.IDstudent = miss.IDstudent)
ON(groups.IDgroup = students.IDgroup) AND(groups.IDgroup = miss.IDgroup))
ON specialty.IDspecialty = groups.IDspecialty WHERE specialty.Name =
'" + DateFind.otdel + "' GROUP BY students.Student"
what does it - it selects all students with misses, 2, non-admission to lessons. And i need to count amount of students with that parameters.
and i tried to do something with counting via adding
SELECT COUNT(student) FROM students.student WHERE
and it does nothing. Idk how to work with count so help pls, i rly checked on internet and there was only simple queries like count by 1 field without any innerjoins and etc.

If your posted query works, then wrap this as a subquery:
"Select Count(*) From (SELECT students.Student FROM specialty INNER JOIN (groups INNER JOIN
((mark INNER JOIN students ON mark.idstudent = students.IDstudent)
INNER JOIN miss ON students.IDstudent = miss.IDstudent)
ON (groups.IDgroup = students.IDgroup) AND (groups.IDgroup = miss.IDgroup))
ON specialty.IDspecialty = groups.IDspecialty WHERE specialty.Name =
'" + DateFind.otdel + "' GROUP BY students.Student) As T"

Syntax error (missing operator) in query expression c# (access database)

Hello! I tried to connect 4 tables form Access in Visual Basic c# and I got "Syntax error (missing operator) in query expression", can you please help me? Thanks!
string query = "Select e.Denumire_Ech, e.Descriere_Ech, e.UnitateMasura, e.Pret_Vanzare, o.Cantitate_EchOf From ECHIPAMENTE e INNER JOIN OFERTE o ON e.Cod_Echipament = o.Cod_Echipament INNER JOIN CONTRACTE c ON c.Cod_Oferta = o.Cod_Oferta INNER JOIN FACTURI f ON f.Nr_Contract = c.Nr_Contract WHERE Nr_Contract='" + CB_Contract.Text + "'";

You have multiple tables you are joining across but have not specified which table your WHERE clause is looking up on.
string query = "Select e.Denumire_Ech, e.Descriere_Ech, e.UnitateMasura, e.Pret_Vanzare, o.Cantitate_EchOf From ECHIPAMENTE e INNER JOIN OFERTE o ON e.Cod_Echipament = o.Cod_Echipament INNER JOIN CONTRACTE c ON c.Cod_Oferta = o.Cod_Oferta INNER JOIN FACTURI f ON f.Nr_Contract = c.Nr_Contract WHERE c.Nr_Contract='" + CB_Contract.Text + "'";
Also you should watch out for SQL injection and unusual characters in the CB_Contract.Text For example if there is a ' character then the sql will fail.

Valid SQL Statement Returning 'Syntax Error" in Asp.NET

I'm making an ASP.Net web application, but it is returning a syntax error whenever I try to load the page.
My DB schema can be seen here http://sqlfiddle.com/#!2/739c4/7
Here is the SQL query:
SELECT
tblOrderTransactions.ordertransaction_orderid AS orderid,
tblProducts.product_name AS productname,
tblOrders.order_customer AS ordercustomer
FROM
tblProducts
LEFT JOIN tblOrderTransactions
ON tblProducts.product_id = tblOrderTransactions.ordertransaction_productid
LEFT JOIN tblOrders
ON tblOrderTransactions.ordertransaction_orderid = tblOrders.order_id
WHERE
(
(
(
tblOrderTransactions.ordertransaction_orderid
)
=3
)
) and (
(
(tblOrders.order_customer)
=3
)
)
The SQL works in sqlfiddle, and if I remove the part that says
LEFT JOIN tblOrders
ON tblOrderTransactions.ordertransaction_orderid = tblOrders.order_id
in my web application, the table loads. Adding this second INNER JOIN seems to be messing it up, but the same query works in sqlfiddle, so I believe the SQL is correct.
The error message I receive is
Syntax error (missing operator) in query expression 'tblProducts.product_id = tblOrderTransactions.ordertransaction_productid LEFT JOIN tblOrders ON tblOrderTransactions.ordertransaction_orderid = tblOrders.order_i'.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Data.OleDb.OleDbException: Syntax error (missing operator) in query expression 'tblProducts.product_id = tblOrderTransactions.ordertransaction_productid LEFT JOIN tblOrders ON tblOrderTransactions.ordertransaction_orderid = tblOrders.order_i'.
C# Code inside the application:
string orderID = Request.QueryString["id"];
OleDbConnection conn = new OleDbConnection();
conn.ConnectionString = ConfigurationManager.ConnectionStrings["finalConnString"].ConnectionString;
string commText = #"SELECT tblOrderTransactions.ordertransaction_orderid AS orderid, tblProducts.product_name AS productname
FROM tblProducts
LEFT JOIN tblOrderTransactions
ON tblProducts.product_id = tblOrderTransactions.ordertransaction_productid
LEFT JOIN tblOrders
ON tblOrderTransactions.ordertransaction_orderid = tblOrders.order_id
WHERE (((tblOrderTransactions.ordertransaction_orderid)=?)) ";
conn.Open();
OleDbCommand comm = conn.CreateCommand();
comm.Connection = conn;
comm.CommandText = commText;
OleDbParameter param;
param = comm.CreateParameter();
param.DbType = DbType.Int32;
param.Direction = ParameterDirection.Input;
param.Value = Int32.Parse(orderID);
comm.Parameters.Add(param);
//param = comm.CreateParameter();
//param.DbType = DbType.Int32;
//param.Direction = ParameterDirection.Input;
//param.Value = Session["LoggedInId"];
//comm.Parameters.Add(param);
OleDbDataReader reader = comm.ExecuteReader();
if (reader.HasRows)
{
rptOrders.DataSource = reader;
rptOrders.DataBind();
lblOrderNumber.Text = orderID.ToString();
}
else
{
Response.Write("You are not authorized to view this order.");
}
//Free up the connection
conn.Close();

The SQL Statement must have the joins nested in parentheses because of Access specific syntax (Thank you #MattiVirkkunen for that knowledge).
The correct way to write this SQL statement is:
SELECT tblOrderTransactions.ordertransaction_orderid, tblProducts.product_name, tblOrders.order_customer
FROM tblProducts
INNER JOIN (tblOrders
INNER JOIN tblOrderTransactions
ON tblOrders.[order_id] = tblOrderTransactions.[ordertransaction_orderid])
ON tblProducts.[product_id] = tblOrderTransactions.[ordertransaction_productid]
WHERE (((tblOrderTransactions.ordertransaction_orderid)=3)) and (((tblOrders.order_customer)=3))

First, I would suggest working with aliases to keep your query a little shorter to read (and type) such as below.
SELECT
OT.ordertransaction_orderid AS orderid,
P.product_name AS productname,
O.order_customer AS ordercustomer
FROM
tblProducts P
LEFT JOIN tblOrderTransactions OT
ON P.product_id = OT.ordertransaction_productid
LEFT JOIN tblOrders
ON OT.ordertransaction_orderid = O.order_id
WHERE
OT.ordertransaction_orderid = 3
and O.order_customer = 3
Second, it does look completely legit and nothing glaring out as invalid. But error of loading the page MIGHT be due to no records being returned. You have your query with left-joins, but then throwing in your WHERE clause for both the "tblOrderTransactions" and "tblOrders" tables changes it to an INNER JOIN result.
So, your query looking for order ID = 3 and also the customer = 3, what if that was not the case, that order #3 was customer #1 which would result in NO RECORDS.
Getting back to now seeing your posted syntax, it looks unbalanced parens ((( )) that might be the issue.
And a final review.. Your "ID" from the query string. Is it properly doing an int.Parse() against it? I know on some instances of int.parse() I've done in the past, if the string started with a space vs actual number, int.Parse() would throw an error... Confirm the incoming values and did it really convert as you expected.

SQL error in C#

conn.Open();
String sql = "select CATEGORIES.CAT_NAME,PRODUCTS.PRO_MODEL,PRODUCTS.PRO_NAME,PRODUCTS.PRO_PRICE,PRODUCTS.PRO_IMAGE,PRODUCTS.PRO_DESCRIPTION,PRODUCTS.PRO_STATUS,PRODUCTS.PRO_ACTIVE" +
"from PRODUCTS INNER JOIN CATEGORIES on PRODUCTS.CAT_ID = CATEGORIES.CAT_ID";
My Query SQL runs fine in MYSQL Server but it has error in C# code Incorrect syntax near the keyword 'INNER'. hope have answer soon

You need to add space between (.PRO_ACTIVE" and "from) string concatenation.
.PRO_ACTIVE " + "from...
So your query should be:
String sql = "select CATEGORIES.CAT_NAME,PRODUCTS.PRO_MODEL,PRODUCTS.PRO_NAME,PRODUCTS.PRO_PRICE,PRODUCTS.PRO_IMAGE,PRODUCTS.PRO_DESCRIPTION,PRODUCTS.PRO_STATUS,PRODUCTS.PRO_ACTIVE"
+ " " +//explicit space
"from PRODUCTS INNER JOIN CATEGORIES on PRODUCTS.CAT_ID = CATEGORIES.CAT_ID";

You need a space at the end of the first line of your string -- C# doesn't put line feeds in.

change it to:
String sql = "select CATEGORIES.CAT_NAME,PRODUCTS.PRO_MODEL,PRODUCTS.PRO_NAME,PRODUCTS.PRO_PRICE,PRODUCTS.PRO_IMAGE,PRODUCTS.PRO_DESCRIPTION,PRODUCTS.PRO_STATUS,PRODUCTS.PRO_ACTIVE" +
" from PRODUCTS INNER JOIN CATEGORIES on PRODUCTS.CAT_ID = CATEGORIES.CAT_ID";
A space was missing between "..PRODUCTS.PRO_ACTIVE" and "from PRODUCTS.."

SQL bulk update, a field increment

So i learned how to do a bulk insert using data from one table as the userId from another table. Now i tried to do the same thing but i have a SQL(ite) error. I took a guess at the syntax and i got it wrong. After i bulk insert into the subscription i want to add 1 to each of the users media count. I have a left join error. How do i correct it?
-edit- I haven't solve this yet. Please help.
NOTE: I am using sqlite ATM but I am switching to mysql or MS sql
void updateMediaForSubscribers(long userId, long mediaId, Media_Base.Catagory cat, DateTime currentDate)
{
command.CommandText =
"INSERT INTO user_media_subscription (recipientId, mediaId, catagory) " +
"SELECT watcher, #mediaId, #category " +
"FROM user_watch WHERE watched=#watched;";
command.Parameters.Add("#mediaId", DbType.Int64).Value = mediaId;
command.Parameters.Add("#category", DbType.Int64).Value = cat;
command.Parameters.Add("#watched", DbType.Int64).Value = userId;
command.ExecuteNonQuery();
//near "LEFT": syntax error
command.CommandText =
"UPDATE user_data SET mediaMsgCount=mediaMsgCount+1 " +
"LEFT JOIN user_watch AS w ON w.watcher=user_data.userId " +
"WHERE w.watched=#watched;";
command.Parameters.Add("#watched", DbType.Int64).Value = userId;
command.ExecuteNonQuery();
}

UPDATE user_data
SET mediaMsgCount=mediaMsgCount+1
LEFT JOIN user_watch AS w ON w.watcher=user_data.userId
WHERE w.watched=#watched
Looks like it won't work to me, because you're joining in an UPDATE query but without a "FROM" clause, have you tried:
UPDATE u
SET u.mediaMsgCount = u.mediaMsgCount+1
FROM user_data u
LEFT JOIN user_watch AS w ON w.watcher=u.userId
WHERE w.watched=#watched

UPDATE user_data
SET mediaMsgCount = u.mediaMsgCount + 1
FROM user_data u LEFT OUTER JOIN user_watch w ON w.watcher = u.userId
WHERE w.watched=#watched
Honestly, I'm not really sure why you're using a left outer join since the update is dependant on user_watch... might want to change the "LEFT OUTER JOIN" to an "INNER JOIN".
Also, its a good idea to prefix your table name with the owner, I.E. dbo.user_data ... if you dont do that then sql server has to do a lookup.