UNIX for Beginners Questions & Answers

XY|abc@xyz.com
XY|abc@xyz.com
ST|abc@xyz.com
ST|abc@xyz.com
ST|XYZ@abc.com
FK|abc@xyz.com
FK|STG@xyz.com
FK|abc@xyz.com
FK|FKG@xyz.com

grep -o -w 'XY' test.dat|wc -w
grep -o -w 'ST' test.dat|wc -w
grep -o -w 'FK' test.dat|wc -w

grep -Eow "XY|ST|FK" file | sort | uniq -c
      4 FK
      3 ST
      2 XY

awk -F"|" '{A[$1]++} END{for(i in A){print A[i],i}}'   Input_file

awk -F"|" '{if(!A[$1]){++i};B[i]=++A[$1] OFS $1} END{for(j=1;j<=i;j++){print B[j]}}'   Input_file
OR
awk -F"|" '!A[$1]{++i} {B[i]=++A[$1] OFS $1} END{for(j=1;j<=i;j++){print B[j]}}'   Input_file

for i in XY ST FK; do echo "$i=$(grep -wc "$i" test.dat)"; done

awk -F'|' 'C[$1]++==0 { A[++amax]=$1 } END { for (a=1; a<=amax; a++) print A[a]"="C[A[a]] }' test.dat