int sqlite3_bind_parameter_index(sqlite3_stmt*, const char *zName);
Return the index of an SQL parameter given its name. The index value returned is suitable for use as the second parameter to sqlite3_bind(). A zero is returned if no matching parameter is found. The parameter name must be given in UTF-8 even if the original statement was prepared from UTF-16 text using sqlite3_prepare16_v2() or sqlite3_prepare16_v3().
See also: sqlite3_bind(), sqlite3_bind_parameter_count(), and sqlite3_bind_parameter_name().
See also lists of Objects, Constants, and Functions.
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https://sqlite.org/c3ref/bind_parameter_index.html