データベーステーブルの特定の列とそれぞれの文字列を比較する方法

Question

データベーステーブルの特定の列の値をシェルスクリプトのそれぞれの入力文字列と比較したいと思います。これどうやってするの？ 次のスクリプトでは、すべての顧客の値を読み取るが、最初の値のみを読み取る。私に何ができる？

customer=$(sqlite3 $databasename.db "select cus_name from $table_name"); if [[ $c_name != $customer ]];

#!/bin/bash 

echo " --- Enter the Database name ---" 
read databasename 

echo " --- enter the table name --- " 
read table_name 

sqlite3 $databasename.db "DROP TABLE IF EXISTS $table_name;" 

sqlite3 $databasename.db "CREATE TABLE IF NOT EXISTS $table_name(cus_id INTEGER PRIMARY KEY AUTOINCREMENT UNIQUE,cus_name TEXT NOT NULL UNIQUE ,cus_domain TEXT UNIQUE, cus_status TEXT NOT NULL,Port INTEGER NOT NULL);" 


echo " --- Enter the total number of customer records do you want ---" 
read cus_count 


echo "--- Enter the following details one by one---" 

port_num=8080 

for((i=1;i<=cus_count;i++)) 
do 


echo "enter the $i customer details" 

echo "---Enter the customer name---" 
read c_name 

customer=$(sqlite3 $databasename.db "select cus_name from $table_name"); 


if [[ $c_name != $customer ]]; 

then 
    echo "---Enter the Status(Active/Inactive)---" 
    read c_status 

if [[ "$port_num" == "$port_num" ]]; then 
     port_num=$(($port_num + 1)) 

c_domain="$c_name" 


sqlite3 $databasename.db "INSERT OR IGNORE INTO $table_name (cus_name,cus_domain,cus_status, Port) VALUES(\"$c_name\",\"${c_domain,,}.in\",\"$c_status\",\"$port_num\") ;" 
fi 


else 
    echo "!!!OOPS you entered customer name already available!!!" 
    echo "---Please enter new customer name---" 

i=$(($i - 1)) 

fi 
done 
done 

echo " --- Records from the $table_name ---" 

sqlite3 $databasename.db "select * from $table_name;" 

Answer 1

for customer in "${cus_array[@]}" 
do 
if [[ "$c_name" != "$customer" ]] 
then 
.. 
fi 
done