Improved some SQL calls.

ddbank.sh

@@ -119,14 +119,14 @@ do
             LAST_USER=$with_user
             ## Not sure why this was here...
             #echo "$with_user" | awk 'FNR == 1 {print}' 
+
             # Grabs the current amount the user has stored in the database.
             with_1_amt=$($db_conn "select id,username,balance from account join balance using (id) where username='$with_user';"| awk 'FNR == 3' | awk -F\| '{print $3}')
+            
             # This grabs the user's ID to use on the balance table.
             with_user_id=$($db_conn "select id,username,balance from account join balance using (id) where username='$with_user';" | awk 'FNR == 3' | awk -F\| '{print $1}')
-            # Does the math to minus the withdraw.
-            with_new_amt=$($db_conn "select balance - '$with_amt' from balance where id = '$with_user_id';" | awk 'FNR ==3')
             # Updates the database with the new amount.
-            $db_conn "update balance set balance = '$with_new_amt' where id = '$with_user_id';" 
+            $db_conn "update balance set balance = balance - '$with_amt' where id = '$with_user_id';" 
             # Transactioning
             $db_conn "insert into transaction (id,username,amount,timestamp) values ('$with_user_id','$with_user','-$with_amt','now');" ;;
         2 ) read -p "Deposit to user: " depo_user
@@ -135,10 +135,8 @@ do
             depo_1_amt=$($db_conn "select id,username,balance from account join balance using (id) where username='$depo_user';"| awk 'FNR == 3' | awk -F\| '{print $3}')
             # This grabs the user's ID to use on the balance table.
             depo_user_id=$($db_conn "select id,username,balance from account join balance using (id) where username='$depo_user';" | awk 'FNR == 3' | awk -F\| '{print $1}')
-            # Does the math to add the withdraw.
-            depo_new_amt=$($db_conn "select balance + '$depo_amt' from balance where id = '$depo_user_id';" | awk 'FNR ==3')
             # Updates the database with the new amount.
-            $db_conn "update balance set balance = '$depo_new_amt' where id = '$depo_user_id';" 
+            $db_conn "update balance set balance = balance + '$depo_amt' where id = '$depo_user_id';" 
             # Transactioning
             $db_conn "insert into transaction (id,username,amount,timestamp) values ('$depo_user_id','$depo_user','+$depo_amt','now');" ;;
         3 ) read -p "Transfer from user: " tran_user1
@@ -147,12 +145,9 @@ do
             # Grabs user IDs.
             tran_user1_id=$($db_conn "select id,username,balance from account join balance using (id) where username='$tran_user1';" | awk 'FNR == 3' | awk -F\| '{print $1}')
             tran_user2_id=$($db_conn "select id,username,balance from account join balance using (id) where username='$tran_user2';" | awk 'FNR == 3' | awk -F\| '{print $1}')
-           # Does the math to complete the transfer.
-            tran1_new_amt=$($db_conn "select balance - '$tran_amt' from balance where id = '$tran_user1_id';" | awk 'FNR ==3')
-            tran2_new_amt=$($db_conn "select balance + '$tran_amt' from balance where id = '$tran_user2_id';" | awk 'FNR ==3')
             # Updates the database with the new amounts.
-            $db_conn "update balance set balance = '$tran1_new_amt' where id = '$tran_user1_id';"
-            $db_conn "update balance set balance = '$tran2_new_amt' where id = '$tran_user2_id';"
+            $db_conn "update balance set balance = balance - '$tran_amt' where id = '$tran_user1_id';"
+            $db_conn "update balance set balance = balance + '$tran_amt' where id = '$tran_user2_id';"
             # Transactioning
             $db_conn "insert into transaction (id,username,amount,timestamp) values ('$tran_user1_id','$tran_user1','-$tran_amt','now');" 
             $db_conn "insert into transaction (id,username,amount,timestamp) values ('$tran_user2_id','$tran_user2','+$tran_amt','now');" 
@@ -175,7 +170,7 @@ do
     echo "3) Show last 5 Transactions."
     echo ""
     echo "q) Go back." 
-    echo ::
+    echo ""
     read -n1 -p "*Transaction Menu: Select from above: " ii_tmenu 
     case $ii_tmenu in
         1 ) echo ""
@@ -192,7 +187,7 @@ do
             } fi
             $db_conn "select id,username,amount,timestamp from transaction order by timestamp DESC limit $tmenu_num2;" ;;
         3 ) echo ""
-            $db_conn "select id,username,amount,timestamp from transaction order by timestamp DESC limit 5;"
+            $db_conn "select id,username,amount,timestamp from transaction order by timestamp DESC limit 5;"    ;;
         [0q] ) break ;;
         * ) clear ;;