How to readtable filtering columns and rows?

Hello,

Maybe someone knows if there is a way to readtable not only defining the column names but defining rows values as well? I have a *.csv file :

ReceivingDate	ReceivingTime	SecurityID	Asset	EntryType	EntryPrice	EntrySize
20180429	16:53:28.944250499	10062	FOB	A	0	0
20180429	16:53:28.944250499	10062	FOB	B	0.03125	5
20180429	16:53:33.913990105	10062	FOB	A	0	0
20180429	16:53:33.913990105	10062	FOB	B	0	0
20180429	16:53:41.173484956	10062	FOB	A	0.03125	5
20180429	16:53:41.173484956	10062	FOB	B	0	0
20180430	16:54:55.254652081	10062	FOB	A	0.03125	5
20180430	16:54:55.254652081	10062	FOB	B	0.078125	1
20180430	17:06:59.219609240	10062	FOB	A	0.03125	5
20180430	17:06:59.219609240	10062	FOB	B	0	1
20180430	17:11:55.316770824	10062	FOB	A	0.03125	5
20180430	17:11:55.316770824	10062	FOB	B	0.0078125	1

I use this code to define which columns to read:

opts = detectImportOptions('trys.csv');
opts.SelectedVariableNames = {'ReceivingDate','ReceivingTime','EntryType','EntryPrice'};
t = readtable('trys.csv',opts);

And the result is as follows:

ReceivingDate	ReceivingTime	EntryType	EntryPrice
20180429	16:53:28.944250499	A	0
20180429	16:53:28.944250499	B	0.03125
20180429	16:53:33.913990105	A	0
20180429	16:53:33.913990105	B	0
20180429	16:53:41.173484956	A	0.03125
20180429	16:53:41.173484956	B	0
20180430	16:54:55.254652081	A	0.03125
20180430	16:54:55.254652081	B	0.078125
20180430	17:06:59.219609240	A	0.03125
20180430	17:06:59.219609240	B	0
20180430	17:11:55.316770824	A	0.03125
20180430	17:11:55.316770824	B	0.0078125

Would it be possible to filter row values (20180430), that final readtable result would be

ReceivingDate	ReceivingTime	EntryType	EntryPrice
20180430	16:54:55.254652081	A	0.03125
20180430	16:54:55.254652081	B	0.078125
20180430	17:06:59.219609240	A	0.03125
20180430	17:06:59.219609240	B	0
20180430	17:11:55.316770824	A	0.03125
20180430	17:11:55.316770824	B	0.0078125

Answer 1

[Jan]

There would not be a big advantage, if readtable filters the contents of the data already, because it has to read the complete file in any way. I'd prefer to let readtable read the complete file and to select the wanted data afterwards. Otherwise readtable becomes a multi-purpose function, a "one hammer hits all I need".

[Jorge Filipe]

When you have an huge csv of many GB, that is not an option.

[Jan]

A CSV file of many GB is a design error already. Human readable files are useful only, if they have to be read end edited by human. A "many GB" file is too large to do this. So a binary file is the better choice.