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examples/exists.cpp
511 строк
23 KB
Yevgeniy Zakharov
fixed bugs in queries in examples
01 мар 2022, 05:21
01 мар 2022, 05:21
1ce6343
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/** * Example is implemented from here https://www.w3resource.com/sqlite/exists-operator.php */ #include <sqlite_orm/sqlite_orm.h> #include <string> #include <iostream> using std::cout; using std::endl; struct Customer { std::string code; std::string name; std::string city; std::string workingArea; std::string country; int grade; double openingAmt; double receiveAmt; double paymentAmt; double outstandingAmt; std::string phoneNo; std::string agentCode; }; struct Agent { std::string code; std::string name; std::string workingArea; double comission; std::string phoneNo; std::string country; }; struct Order { std::string num; int amount; int advanceAmount; std::string date; std::string custCode; std::string agentCode; }; int main(int, char**) { using namespace sqlite_orm; auto storage = make_storage("exists.sqlite", make_table("customer", make_column("CUST_CODE", &Customer::code, primary_key()), make_column("CUST_NAME", &Customer::name), make_column("CUST_CITY", &Customer::city), make_column("WORKING_AREA", &Customer::workingArea), make_column("CUST_COUNTRY", &Customer::country), make_column("GRADE", &Customer::grade), make_column("OPENING_AMT", &Customer::openingAmt), make_column("RECEIVE_AMT", &Customer::receiveAmt), make_column("PAYMENT_AMT", &Customer::paymentAmt), make_column("OUTSTANDING_AMT", &Customer::outstandingAmt), make_column("PHONE_NO", &Customer::phoneNo), make_column("AGENT_CODE", &Customer::agentCode)), make_table("agents", make_column("AGENT_CODE", &Agent::code, primary_key()), make_column("AGENT_NAME", &Agent::name), make_column("WORKING_AREA", &Agent::workingArea), make_column("COMMISSION", &Agent::comission), make_column("PHONE_NO", &Agent::phoneNo), make_column("COUNTRY", &Agent::country)), make_table("orders", make_column("ORD_NUM", &Order::num, primary_key()), make_column("ORD_AMOUNT", &Order::amount), make_column("ADVANCE_AMOUNT", &Order::advanceAmount), make_column("ORD_DATE", &Order::date), make_column("CUST_CODE", &Order::custCode), make_column("AGENT_CODE", &Order::agentCode))); storage.sync_schema(); storage.remove_all<Order>(); storage.remove_all<Agent>(); storage.remove_all<Customer>(); storage.replace(Agent{"A007", "Ramasundar", "Bangalore", 0.15, "077-25814763", ""}); storage.replace(Agent{"A003", "Alex", "London", 0.13, "075-12458969", ""}); storage.replace(Agent{"A008", "Alford", "New York", 0.12, "044-25874365", ""}); storage.replace(Agent{"A011", "Ravi Kumar", "Bangalore", 0.15, "077-45625874", ""}); storage.replace(Agent{"A010", "Santakumar", "Chennai", 0.14, "007-22388644", ""}); storage.replace(Agent{"A012", "Lucida", "San Jose", 0.12, "044-52981425", ""}); storage.replace(Agent{"A005", "Anderson", "Brisban", 0.13, "045-21447739", ""}); storage.replace(Agent{"A001", "Subbarao", "Bangalore", 0.14, "077-12346674", ""}); storage.replace(Agent{"A002", "Mukesh", "Mumbai", 0.11, "029-12358964", ""}); storage.replace(Agent{"A006", "McDen", "London", 0.15, "078-22255588", ""}); storage.replace(Agent{"A004", "Ivan", "Torento", 0.15, "008-22544166", ""}); storage.replace(Agent{"A009", "Benjamin", "Hampshair", 0.11, "008-22536178", ""}); storage.replace(Customer{"C00013", "Holmes", "London", "London", "UK", 2, 6000.00, 5000.00, 7000.00, 4000.00, "BBBBBBB", "A003"}); storage.replace(Customer{"C00001", "Micheal", "New York", "New York", "USA", 2, 3000.00, 5000.00, 2000.00, 6000.00, "CCCCCCC", "A008"}); storage.replace(Customer{"C00020", "Albert", "New York", "New York", "USA", 3, 5000.00, 7000.00, 6000.00, 6000.00, "BBBBSBB", "A008"}); storage.replace(Customer{"C00025", "Ravindran", "Bangalore", "Bangalore", "India", 2, 5000.00, 7000.00, 4000.00, 8000.00, "AVAVAVA", "A011"}); storage.replace( Customer{"C00024", "Cook", "London", "London", "UK", 2, 4000.00, 9000.00, 7000.00, 6000.00, "FSDDSDF", "A006"}); storage.replace(Customer{"C00015", "Stuart", "London", "London", "UK", 1, 6000.00, 8000.00, 3000.00, 11000.00, "GFSGERS", "A003"}); storage.replace(Customer{"C00002", "Bolt", "New York", "New York", "USA", 3, 5000.00, 7000.00, 9000.00, 3000.00, "DDNRDRH", "A008"}); storage.replace(Customer{"C00018", "Fleming", "Brisban", "Brisban", "Australia", 2, 7000.00, 7000.00, 9000.00, 5000.00, "NHBGVFC", "A005"}); storage.replace(Customer{"C00021", "Jacks", "Brisban", "Brisban", "Australia", 1, 7000.00, 7000.00, 7000.00, 7000.00, "WERTGDF", "A005"}); storage.replace(Customer{"C00019", "Yearannaidu", "Chennai", "Chennai", "India", 1, 8000.00, 7000.00, 7000.00, 8000.00, "ZZZZBFV", "A010"}); storage.replace(Customer{"C00005", "Sasikant", "Mumbai", "Mumbai", "India", 1, 7000.00, 11000.00, 7000.00, 11000.00, "147-25896312", "A002"}); storage.replace(Customer{"C00007", "Ramanathan", "Chennai", "Chennai", "India", 1, 7000.00, 11000.00, 9000.00, 9000.00, "GHRDWSD", "A010"}); storage.replace(Customer{"C00022", "Avinash", "Mumbai", "Mumbai", "India", 2, 7000.00, 11000.00, 9000.00, 9000.00, "113-12345678", "A002"}); storage.replace(Customer{"C00004", "Winston", "Brisban", "Brisban", "Australia", 1, 5000.00, 8000.00, 7000.00, 6000.00, "AAAAAAA", "A005"}); storage.replace( Customer{"C00023", "Karl", "London", "London", "UK", 0, 4000.00, 6000.00, 7000.00, 3000.00, "AAAABAA", "A006"}); storage.replace(Customer{"C00006", "Shilton", "Torento", "Torento", "Canada", 1, 10000.00, 7000.00, 6000.00, 11000.00, "DDDDDDD", "A004"}); storage.replace(Customer{"C00010", "Charles", "Hampshair", "Hampshair", "UK", 3, 6000.00, 4000.00, 5000.00, 5000.00, "MMMMMMM", "A009"}); storage.replace(Customer{"C00017", "Srinivas", "Bangalore", "Bangalore", "India", 2, 8000.00, 4000.00, 3000.00, 9000.00, "AAAAAAB", "A007"}); storage.replace(Customer{"C00012", "Steven", "San Jose", "San Jose", "USA", 1, 5000.00, 7000.00, 9000.00, 3000.00, "KRFYGJK", "A012"}); storage.replace(Customer{"C00008", "Karolina", "Torento", "Torento", "Canada", 1, 7000.00, 7000.00, 9000.00, 5000.00, "HJKORED", "A004"}); storage.replace(Customer{"C00003", "Martin", "Torento", "Torento", "Canada", 2, 8000.00, 7000.00, 7000.00, 8000.00, "MJYURFD", "A004"}); storage.replace(Customer{"C00009", "Ramesh", "Mumbai", "Mumbai", "India", 3, 8000.00, 7000.00, 3000.00, 12000.00, "Phone No", "A002"}); storage.replace(Customer{"C00014", "Rangarappa", "Bangalore", "Bangalore", "India", 2, 8000.00, 11000.00, 7000.00, 12000.00, "AAAATGF", "A001"}); storage.replace(Customer{"C00016", "Venkatpati", "Bangalore", "Bangalore", "India", 2, 8000.00, 11000.00, 7000.00, 12000.00, "JRTVFDD", "A007"}); storage.replace(Customer{"C00011", "Sundariya", "Chennai", "Chennai", "India", 3, 7000.00, 11000.00, 7000.00, 11000.00, "PPHGRTS", "A010"}); storage.replace(Order{"200114", 3500, 2000, "15-AUG-08", "C00002", "A008"}); storage.replace(Order{"200122", 2500, 400, "16-SEP-08", "C00003", "A004"}); storage.replace(Order{"200118", 500, 100, "20-JUL-08", "C00023", "A006"}); storage.replace(Order{"200119", 4000, 700, "16-SEP-08", "C00007", "A010"}); storage.replace(Order{"200121", 1500, 600, "23-SEP-08", "C00008", "A004"}); storage.replace(Order{"200130", 2500, 400, "30-JUL-08", "C00025", "A011"}); storage.replace(Order{"200134", 4200, 1800, "25-SEP-08", "C00004", "A005"}); storage.replace(Order{"200108", 4000, 600, "15-FEB-08", "C00008", "A004"}); storage.replace(Order{"200103", 1500, 700, "15-MAY-08", "C00021", "A005"}); storage.replace(Order{"200105", 2500, 500, "18-JUL-08", "C00025", "A011"}); storage.replace(Order{"200109", 3500, 800, "30-JUL-08", "C00011", "A010"}); storage.replace(Order{"200101", 3000, 1000, "15-JUL-08", "C00001", "A008"}); storage.replace(Order{"200111", 1000, 300, "10-JUL-08", "C00020", "A008"}); storage.replace(Order{"200104", 1500, 500, "13-MAR-08", "C00006", "A004"}); storage.replace(Order{"200106", 2500, 700, "20-APR-08", "C00005", "A002"}); storage.replace(Order{"200125", 2000, 600, "10-OCT-08", "C00018", "A005"}); storage.replace(Order{"200117", 800, 200, "20-OCT-08", "C00014", "A001"}); storage.replace(Order{"200123", 500, 100, "16-SEP-08", "C00022", "A002"}); storage.replace(Order{"200120", 500, 100, "20-JUL-08", "C00009", "A002"}); storage.replace(Order{"200116", 500, 100, "13-JUL-08", "C00010", "A009"}); storage.replace(Order{"200124", 500, 100, "20-JUN-08", "C00017", "A007"}); storage.replace(Order{"200126", 500, 100, "24-JUN-08", "C00022", "A002"}); storage.replace(Order{"200129", 2500, 500, "20-JUL-08", "C00024", "A006"}); storage.replace(Order{"200127", 2500, 400, "20-JUL-08", "C00015", "A003"}); storage.replace(Order{"200128", 3500, 1500, "20-JUL-08", "C00009", "A002"}); storage.replace(Order{"200135", 2000, 800, "16-SEP-08", "C00007", "A010"}); storage.replace(Order{"200131", 900, 150, "26-AUG-08", "C00012", "A012"}); storage.replace(Order{"200133", 1200, 400, "29-JUN-08", "C00009", "A002"}); storage.replace(Order{"200100", 1000, 600, "08-JAN-08", "C00015", "A003"}); storage.replace(Order{"200110", 3000, 500, "15-APR-08", "C00019", "A010"}); storage.replace(Order{"200107", 4500, 900, "30-AUG-08", "C00007", "A010"}); storage.replace(Order{"200112", 2000, 400, "30-MAY-08", "C00016", "A007"}); storage.replace(Order{"200113", 4000, 600, "10-JUN-08", "C00022", "A002"}); storage.replace(Order{"200102", 2000, 300, "25-MAY-08", "C00012", "A012"}); { // SELECT agent_code,agent_name,working_area,commission // FROM agents // WHERE exists // (SELECT * // FROM customer // WHERE grade=3 AND agents.agent_code=customer.agent_code) // ORDER BY commission; auto rows = storage.select(columns(&Agent::code, &Agent::name, &Agent::workingArea, &Agent::comission), where(exists(select(asterisk<Customer>(), where(is_equal(&Customer::grade, 3) and is_equal(&Agent::code, &Customer::agentCode))))), order_by(&Agent::comission)); cout << "AGENT_CODE AGENT_NAME WORKING_AREA COMMISSION" << endl; cout << "---------- ---------------------------------------- ------------ ----------" << endl; for(auto& row: rows) { cout << std::get<0>(row) << '\t' << std::get<1>(row) << '\t' << std::get<2>(row) << '\t' << std::get<3>(row) << endl; } } { // SELECT cust_code, cust_name, cust_city, grade // FROM customer // WHERE grade=2 AND EXISTS // (SELECT COUNT(*) // FROM customer // WHERE grade=2 // GROUP BY grade // HAVING COUNT(*)>2); auto rows = storage.select(columns(&Customer::code, &Customer::name, &Customer::city, &Customer::grade), where(is_equal(&Customer::grade, 2) and exists(select(count<Customer>(), where(is_equal(&Customer::grade, 2)), group_by(&Customer::grade), having(greater_than(count(), 2)))))); cout << "CUST_CODE CUST_NAME CUST_CITY GRADE" << endl; cout << "---------- ---------- ----------------------------------- ----------" << endl; for(auto& row: rows) { cout << std::get<0>(row) << '\t' << std::get<1>(row) << '\t' << std::get<2>(row) << '\t' << std::get<3>(row) << endl; } } { // SELECT agent_code,ord_num,ord_amount,cust_code // FROM orders // WHERE NOT EXISTS // (SELECT agent_code // FROM customer // WHERE payment_amt=1400); auto rows = storage.select( columns(&Order::agentCode, &Order::num, &Order::amount, &Order::custCode), from<Order>(), where(not exists(select(&Customer::agentCode, where(is_equal(&Customer::paymentAmt, 1400)))))); cout << "AGENT_CODE ORD_NUM ORD_AMOUNT CUST_CODE" << endl; for(auto& row: rows) { cout << std::get<0>(row) << '\t' << std::get<1>(row) << '\t' << std::get<2>(row) << '\t' << std::get<3>(row) << endl; } } { // SELECT "orders"."AGENT_CODE", "orders"."ORD_NUM", "orders"."ORD_AMOUNT", "orders"."CUST_CODE", 'c'."PAYMENT_AMT" // FROM 'orders' INNER JOIN 'customer' 'c' ON('c'."AGENT_CODE" = "orders"."AGENT_CODE") // WHERE(NOT(EXISTS // ( // SELECT 'd'."AGENT_CODE" FROM 'customer' 'd' WHERE((('c'."PAYMENT_AMT" = 7000) AND('d'."AGENT_CODE" = 'c'."AGENT_CODE"))))) // ) // ORDER BY 'c'."PAYMENT_AMT" using als = alias_c<Customer>; using als_2 = alias_d<Customer>; double amount = 2000; auto where_clause = select(alias_column<als_2>(&Customer::agentCode), from<als_2>(), where(is_equal(alias_column<als>(&Customer::paymentAmt), std::ref(amount)) and (alias_column<als_2>(&Customer::agentCode) == c(alias_column<als>(&Customer::agentCode))))); amount = 7000; auto statement = storage.prepare(select(columns(&Order::agentCode, &Order::num, &Order::amount, &Order::custCode, alias_column<als>(&Customer::paymentAmt)), from<Order>(), inner_join<als>(on(alias_column<als>(&Customer::agentCode) == c(&Order::agentCode))), where(not exists(where_clause)), order_by(alias_column<als>(&Customer::paymentAmt)))); auto sql = statement.expanded_sql(); auto rows = storage.execute(statement); cout << endl; for(auto& row: rows) { cout << std::get<0>(row) << '\t' << std::get<1>(row) << '\t' << std::get<2>(row) << '\t' << std::get<3>(row) << '\t' << std::get<4>(row) << endl; } } return 0; }