How to append an integer to a const char value in iPhone?
I have SQL query statement which used to display the contents in the table. The SQL statement consist of a where clause which is to be appended with numeric value as 1 ,2 3 etc depends upon the previously selected content. I am having the numeric value as int and I want it to append to SQL statement which is const char. How can I append both the values?
My query is:
select * from Book where id=1;
I h开发者_C百科ave the id value is integer
You simply bind the parameter. E.g.:
sqlite3 *db;
... // open database
sqlite3_stmt *pStmt;
sqlite3_prepare_v2(
db,
"select * from book where id = ?",
-1,
&pStmt,
NULL
);
sqlite3_bind_int(pStmt, 1, bookId);
See the SQLite documentation on compiling and binding prepared statements. You can reuse the same statement more than once. sqlite3_clear_bindings
lets you reset the values.
Is this what you're looking for?
NSString* result = [NSString stringWithFormat:@"SELECT * FROM Book WHERE id=%d", myInt];
to compose your SQL string?
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