Dropping Multiple Observation using DROP

[Farhan Hasnat]

I am trying to drop multiple observation using DROP, however ending up with an error

drop if Ticker==TH:CMAN | Ticker==TH:COMAN

I tried using " || " as well. Any suggestions would be great

Below is sample of my data

* Example generated by -dataex-. For more info, type help dataex
clear
input str9 Ticker int Year long WC01651
"TH:2S"  1994        .
"TH:2S"  1995        .
"TH:2S"  1996        .
"TH:2S"  1997        .
"TH:2S"  1998        .
"TH:2S"  1999        .
"TH:2S"  2000        .
"TH:2S"  2001        .
"TH:2S"  2002        .
"TH:2S"  2003        .
"TH:2S"  2004        .
"TH:2S"  2005        .
"TH:2S"  2006    34020
"TH:2S"  2007    55390
"TH:2S"  2008   112840
"TH:2S"  2009    91864
"TH:2S"  2010    71431
"TH:2S"  2011    64980
"TH:2S"  2012    52643
"TH:2S"  2013    68031
"TH:2S"  2014    41898
"TH:7UP" 1994        .
"TH:7UP" 1995        .
"TH:7UP" 1996        .
"TH:7UP" 1997        .
"TH:7UP" 1998        .
"TH:7UP" 1999        .
"TH:7UP" 2000        .
"TH:7UP" 2001    84000
"TH:7UP" 2002   301429
"TH:7UP" 2003  -123386
"TH:7UP" 2004   178368
"TH:7UP" 2005   179860
"TH:7UP" 2006    67330
"TH:7UP" 2007   146175
"TH:7UP" 2008   125678
"TH:7UP" 2009   126637
"TH:7UP" 2010    66485
"TH:7UP" 2011  -625090
"TH:7UP" 2012   962232
"TH:7UP" 2013    58762
"TH:7UP" 2014  -214396
"TH:A"   1994        .
"TH:A"   1995        .
"TH:A"   1996        .
"TH:A"   1997        .
"TH:A"   1998        .
"TH:A"   1999        .
"TH:A"   2000        .
"TH:A"   2001        .
"TH:A"   2002        .
"TH:A"   2003    51542
"TH:A"   2004   179015
"TH:A"   2005     8721
"TH:A"   2006     8191
"TH:A"   2007   -78636
"TH:A"   2008    32582
"TH:A"   2009   518008
"TH:A"   2010   427951
"TH:A"   2011    76002
"TH:A"   2012    94353
"TH:A"   2013    13777
"TH:A"   2014    41266
"TH:A5"  1994        .
"TH:A5"  1995        .
"TH:A5"  1996        .
"TH:A5"  1997        .
"TH:A5"  1998        .
"TH:A5"  1999        .
"TH:A5"  2000        .
"TH:A5"  2001        .
"TH:A5"  2002    23850
"TH:A5"  2003    29739
"TH:A5"  2004    37936
"TH:A5"  2005   -53245
"TH:A5"  2006  -140825
"TH:A5"  2007   -47732
"TH:A5"  2008   -72508
"TH:A5"  2009   -50292
"TH:A5"  2010   -59916
"TH:A5"  2011    -9658
"TH:A5"  2012   -50444
"TH:A5"  2013   -14595
"TH:A5"  2014   -69825
"TH:AA"  1994  -334257
"TH:AA"  1995   -95536
"TH:AA"  1996  -912982
"TH:AA"  1997 -7011903
"TH:AA"  1998  4768554
"TH:AA"  1999 -3734238
"TH:AA"  2000   628910
"TH:AA"  2001   199010
"TH:AA"  2002  1195095
"TH:AA"  2003  1495941
"TH:AA"  2004  1518619
"TH:AA"  2005  1909528
"TH:AA"  2006  1972180
"TH:AA"  2007   430287
"TH:AA"  2008        .
"TH:AA"  2009        .
end

[Rich Goldstein]

the issue is that the strings must be enclosed in double quotes as in:

drop if Ticker=="TH:CMAN" | Ticker=="TH:COMAN"

[Farhan Hasnat]

Rich Goldstein Thank you ! Appreciate your help in finding my mistake