Delete top row from sdf file

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Dear Exper,

I've a .sdf db file. i want to delete first row from a table.

SQL

DELETE TOP (1) FROM   myTable

is not working.

Please let me know wht is the alternative for this.

Posted 20-Aug-12 23:56pm

vidiking

Updated 20-Aug-12 23:58pm

v2

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OriginalGriff · Answer 1 · 2012-08-21T00:18:00

Solution 1

Well, it probably is - but since you don't specify an order, you can't really tell, as the rows that are deleted will depend on the internal order of records, rather than any order you have applied (or think you have applied).

If you want to delete specific records from the top, then you need to select the appropriate records and delete those. The safest general purpose way to do it is:

SQL

DELETE FROM myTable WHERE id IN (SELECT TOP 1 id FROM myTable ORDER BY myOrderColumn)

Posted 21-Aug-12 0:18am

OriginalGriff

Comments

vidiking 21-Aug-12 8:43am

Thank you. But this is giving error in .sdf file.

DELETE FROM myTable WHERE id IN (SELECT TOP 1 id FROM myTable ORDER BY myOrderColumn)
where
1. myTable : is my table name fron .sdf file
2. myOrderColumn : is the column header of the table

OriginalGriff 21-Aug-12 9:59am

And the error is?

Wendelius · Answer 2 · 2012-08-21T11:00:00

Solution 2

If your tags are correct and you're using MySQL, you can use LIMIT clause to retrieve the top records and to delete them.

For example:

SQL

DELETE FROM TheTable
WHERE ...
ORDER BY ...
LIMIT 1;

For more information: DELETE Syntax[^]

Posted 21-Aug-12 11:00am

Wendelius