using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(select\s+|([^,]+as)|from.+)";
string substitution = @"";
string input = @"SELECT id, id_alarm, ne_name, extract(epoch from create_alarm_dt) as create_alarm_dt, extract(epoch from create_date) as create_date, extract(epoch from modify_date) as modify_date, create_user, modify_user, description FROM ecus.prog_ack_comments WHERE create_user='avpozov'
id,id_alarm, ne_name, extract(epoch from create_alarm_dt) as create_alarm_dt, extract(epoch from create_date) as create_date, extract(epoch from modify_date) as modify_date, create_user, modify_user, description";
RegexOptions options = RegexOptions.Multiline | RegexOptions.IgnoreCase;
Regex regex = new Regex(pattern, options);
string result = regex.Replace(input, substitution);
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx