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SQLite Wrapper, test 4 | ||
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This test demonstrates how values can be selected from a table using
SQLiteWrapper::Statement(),
SQLiteWrapper::NextRow(),
SQLiteWrapper::DataType() and
SQLiteWrapper::ValueString().
Statement() returns a pointer to a SQLiteStatement. The values for the
the select statement can then be retrieved through that returned class.
NextRow() returns true as long as there are still records to be fetched.
DataType() returns the datatype for the passed column.
ValueString() returns the value as std::string.
It is assumed that a database with the name SQLiteWrapper.db is already created and that it contains a table named foo. (This is done
with test 1,
test 2 and
test 3).
test_4.cpp
#include <iostream> #include "SQLiteWrapper.h" int main() { SQLiteWrapper sqlite; if (sqlite.Open("SQLiteWrapper.db")) { std::cout << "SQLiteWrapper.db created or opened" << std::endl; } else { std::cout << "couldn't open SQLiteWrapper.db" << std::endl; } SQLiteStatement* stmt = sqlite.Statement("select * from foo"); while (stmt->NextRow()) { std::cout << stmt->DataType (0) << " - " << stmt->DataType (1) << " | " << stmt->ValueString(0) << " - " << stmt->ValueString(1) << std::endl; } return 0; } |