sqlite3_column_int
const void *sqlite3_column_blob(sqlite3_stmt*, int iCol); double sqlite3_column_double(sqlite3_stmt*, int iCol); int sqlite3_column_int(sqlite3_stmt*, int iCol); sqlite3_int64 sqlite3_column_int64(sqlite3_stmt*, int iCol); const unsigned char *sqlite3_col,... sqlite3_collation_needed; sqlite3_collation_needed16; sqlite3_column_blob; sqlite3_column_bytes; sqlite3_column_bytes16; sqlite3_column_count; sqlite3_column_database_name; sqlite3_column_database_name16; sqlite3_column_decltype; sqlite3_column_declty, sqlite3_column_int(result, columnNum); will return one column from the current row of your result as an int. Your prepare function is to prepare your query, it has nothing to do with how the results are interpreted. All data in sqlite3 is stored textuall, Calling sqlite3_column_type for this row returns SQLITE_INTEGER as it's only looking at the value of the column and not the declared column type. This means that the code will then read the value with sqlite3_column_int and I'll end up with an in, When SQLite steps into a record, all integer values are expanded to 64 bits. sqlite3_column_int() returns the lower 32 bits of that value without checking for overflows. When you call sqlite3_column_bytes() , SQLite will convert the value to text, and re,sqlite3_column_int(); //參數prepared statement, column number. //取出每一行的值, return type是int型態. sqlite3_column_string(); //參數參數prepared statement, column number. //取出每一行的值, return type是string型態. sqlite3_finalize(); //參數prepared statement. //刪除prepared statemen, sqlite3_column_int() * sqlite3_column_int64() * sqlite3_column_text() * sqlite3_column_text16() * sqlite3_column_type() * sqlite3_column_value(). sqlite3_finalize() 销毁sqlite3_stmt对象, 所有sqlite3_stmt对象都应该销毁以防止内存泄漏 sqlite3_close() 关闭数据库连接, 销毁sqlite3对象, 所有与这,#include <stdio.h>. #include <sqlite3.h>. int main(void). . sqlite3 *db;. sqlite3_stmt *stmt;. sqlite3_open("expenses.db", &db);. if (db == NULL). . printf("Failed to open DB-n");. return 1;. } printf("Performing q,Name sqlite3_column_xxx() — Get a results column value Definition const void* sqlite3_column_blob( sqlite3_stmt* stmt, int cidx ); double sqlite3_column_double( sqlite3_stmt* stmt, int cidx ); int sqlite3_column_int( sqlite3_stmt* stmt, int cidx ); sqlite,沒有這個頁面的資訊。瞭解原因
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 sqlite3_column_int 相關參考資料
Result Values From A Query - SQLite
const void *sqlite3_column_blob(sqlite3_stmt*, int iCol); double sqlite3_column_double(sqlite3_stmt*, int iCol); int sqlite3_column_int(sqlite3_stmt*, int iCol); sqlite3_int64 sqlite3_column_int64(sql... https://www.sqlite.org CC++ Interface For SQLite Version 3
... sqlite3_collation_needed; sqlite3_collation_needed16; sqlite3_column_blob; sqlite3_column_bytes; sqlite3_column_bytes16; sqlite3_column_count; sqlite3_column_database_name; sqlite3_column_database... https://www.sqlite.org c++ - Getting int values from SQLite - Stack Overflow
sqlite3_column_int(result, columnNum); will return one column from the current row of your result as an int. Your prepare function is to prepare your query, it has nothing to do with how the results ... https://stackoverflow.com ios - Calling sqlite3_column_type returns SQLITE_INTEGER for a ...
Calling sqlite3_column_type for this row returns SQLITE_INTEGER as it's only looking at the value of the column and not the declared column type. This means that the code will then read the value... https://stackoverflow.com sqlite - SQLITE_INTEGER value bytes - Stack Overflow
When SQLite steps into a record, all integer values are expanded to 64 bits. sqlite3_column_int() returns the lower 32 bits of that value without checking for overflows. When you call sqlite3_column_... https://stackoverflow.com SQLite常用API @ Ada & BuLu姊妹的生活日誌:: 痞客邦::
sqlite3_column_int(); //參數prepared statement, column number. //取出每一行的值, return type是int型態. sqlite3_column_string(); //參數參數prepared statement, column number. //取出每一行的值, return type是string型態. sqlite3_fi... http://adalin05.pixnet.net SQLite3 CC++编程接口介绍- CSDN博客
sqlite3_column_int() * sqlite3_column_int64() * sqlite3_column_text() * sqlite3_column_text16() * sqlite3_column_type() * sqlite3_column_value(). sqlite3_finalize() 销毁sqlite3_stmt对象, 所有sqlite3_stmt对象... https://blog.csdn.net sqlite3 C example · GitHub
#include <stdio.h>. #include <sqlite3.h>. int main(void). . sqlite3 *db;. sqlite3_stmt *stmt;. sqlite3_open("expenses.db", &db);. if (db == NULL). . printf("Failed to op... https://gist.github.com sqlite3_column_xxx() - Using SQLite [Book] - Safari Books Online
Name sqlite3_column_xxx() — Get a results column value Definition const void* sqlite3_column_blob( sqlite3_stmt* stmt, int cidx ); double sqlite3_column_double( sqlite3_stmt* stmt, int cidx ); int sql... https://www.safaribooksonline. sqlite3_column_int - MSDN - Microsoft
沒有這個頁面的資訊。瞭解原因 https://social.msdn.microsoft. |