Question

I am working on access but stuck in insert queries having date time. like these queries doesn’t work for me.

INSERT INTO tbl_fuel_levels([genset_id], [rec_time], [fuel_level], 
[grid_electricity], [genset_electricity], [genset_number]) 
VALUES('001', '#12/12/23 18:46:38+20#', '0', 'T', 'F', '[phone]');

INSERT INTO tbl_fuel_levels([genset_id], [rec_time], [fuel_level], 
[grid_electricity], [genset_electricity], [genset_number]) 
VALUES('001', #'12/12/23 18:46:38+20'#, '0', 'T', 'F', '[phone]');

INSERT INTO tbl_fuel_levels([genset_id], [rec_time], [fuel_level], 
[grid_electricity], [genset_electricity], [genset_number]) 
VALUES('001', '12/12/23 18:46:38+20', '0', 'T', 'F', '[phone]');

Any idea? what could be wrong.

Here is my code in c#:

con = new OleDbConnection(ConnStr);
con.Open();

cmd = con.CreateCommand();
cmd.CommandText = "INSERT INTO tbl_fuel_levels([genset_id], [rec_time], 
[fuel_level], [grid_electricity], [genset_electricity], [genset_number]) 
VALUES('" + genset_id + "', '" + rec_time + "', '" + fuel_level + "', '" +
grid_electricity + "', '" + genset_electricity + "', '" + genset_number + "');";
cmd.ExecuteNonQuery();

I have also tried this.

cmd.CommandText = "INSERT INTO tbl_fuel_levels([genset_id], [rec_time], 
[fuel_level], [grid_electricity], [genset_electricity], [genset_number]) 
VALUES('" + genset_id + "', @rec_t, '" + fuel_level + "', '" + grid_electricity 
+ "','" + genset_electricity + "', '" + genset_number + "');";
cmd.Parameters.Add("@rec_t", OleDbType.DBTimeStamp).Value 
                              = DateTime.Parse(rec_time);

All other insert and select queries are working fine

Answer 1

Your INSERT query has more than one problem. I copied this version from your comment to DJ:

INSERT INTO tbl_fuel_levels (
    [genset_id],
    [rec_time],
    [fuel_level],
    [grid_electricity],
    [genset_electricity],
    [genset_number]
    )
VALUES (
    '001',
    '#12/11/2023 2:46:38 PM#',
    '0',
    'T',
    'F',
    '[phone]'
    );

The problems are:

1. You’re attempting to insert the string, '#12/11/2023 2:46:38 PM#' into the Date/Time field rec_time. Discard the single quotes to make that value a Date/Time literal instead of a string: #12/11/2023 2:46:38 PM#
2. You’re attempting to insert the string, 'T' into the Yes/No field grid_electricity. Use True without quotes instead.
3. You’re attempting to insert the string, 'F' into the Yes/No field genset_electricity. This is the same issue as problem #2. Use False without quotes.

Use Access’ query designer to create a new query. Switch it to SQL View and paste in this statement:

INSERT INTO tbl_fuel_levels (
    [genset_id],
    [rec_time],
    [fuel_level],
    [grid_electricity],
    [genset_electricity],
    [genset_number]
    )
VALUES (
    '001',
    #12/11/2023 2:46:38 PM#,
    '0',
    True,
    False,
    '[phone]'
    );

If there are any remaining problems with that statement, work them out in Access before bothering with the c# code to create the statement.

Or better, use the parameters query approach. Maybe you can get that working once you resolve those issues with the Yes/No fields.