I'm using this query on SQLite 3:
Select Message.messageContent, Message.messageDateTime FROM Message INNER JOIN (Contact INNER JOIN contact_m2m_message ON Contact.contactID = contact_m2m_message.contactID) ON Message.msgID = contact_m2m_message.messageID;
it gave me this error: No Such Column: TABLE.ROWID
i'm confused as the very query was working fine when i tested over MS Access DB Engine just for the sake of confirmation. . is there something that i'm missing? or is there a difference in syntax in SQLite? ... I also tried this:
Select Message.messageContent, Message.messageDateTime FROM Message INNER JOIN (Select Contact.contactNumber, Contact.contactName FROM Contact INNER JOIN contact_m2m_message ON Contact.contactID = contact_m2m_message.contactID) ON Message.msgID = contact_m2m_message.messageID;
But this gives me the error:
no such column: contact_m2m_message.messageID ... but it does exist in the definition.
.
.
The task i am striving to accomplish is to populate a list similar to Android Inbox view where each list item contains Contact Name, Number and a little Text from the latest message.
moreover, i'm testing queries using SQLite Studio v2.1.5
1 Answer 1
your first query is standard SQL (the parentheses are redundant, only needed by MS-Access) and should work just fine in SQLite, with or without the parentheses:
SELECT
Message.messageContent, Message.messageDateTime
FROM
Message
INNER JOIN
( Contact INNER JOIN contact_m2m_message
ON Contact.contactID = contact_m2m_message.contactID
)
ON Message.msgID = contact_m2m_message.messageID ;
Edit: Actually, SQLite needs the parentheses, too, at least the version provided in SQL-Fiddle .
The 2nd query is not valid because you have not provided an alias for the derived table:
SELECT
Message.messageContent, Message.messageDateTime
FROM
Message
INNER JOIN
( Select Contact.contactNumber, Contact.contactName
FROM Contact INNER JOIN contact_m2m_message
ON Contact.contactID = contact_m2m_message.contactID
) --<-------------------------------------- no alias
ON Message.msgID = contact_m2m_message.messageID;
To make it work wirh a derived table, you have to provide an alias for the derived table and also add the contact_m2m_message.messageID
in the SELECT
list of the derived table (and remove columns that are not used):
SELECT
Message.messageContent, Message.messageDateTime
FROM
Message
INNER JOIN
( Select -- Contact.contactNumber, Contact.contactName,
contact_m2m_message.messageID
FROM Contact INNER JOIN contact_m2m_message
ON Contact.contactID = contact_m2m_message.contactID
) AS cm
ON Message.msgID = cm.messageID;
But I don't think you should use that. The first query should work. You can re-arrange the order how of the tables are joined. Using table aliases also helps in readibility:
SELECT
m.messageContent, m.messageDateTime
FROM
Message AS m
INNER JOIN
contact_m2m_message AS cm
ON m.msgID = cm.messageID
INNER JOIN
Contact AS c
ON c.contactID = cm.contactID ;
SELECT Message.messageContent, Message.messageDateTime FROM Message INNER JOIN contact_m2m_message ON Message.msgID = contact_m2m_message.messageID INNER JOIN Contact ON Contact.contactID = contact_m2m_message.contactID ;