sqlite_query
SQLiteDatabase->query
(No version information available, might be only in CVS)
SQLiteDatabase->query — Executes a query against a given database and returns a result handle
Descrierea
Object oriented style (method):
Executes an SQL statement given by the query against a given database handle.
Parametri
- dbhandle
-
The SQLite Database resource; returned from sqlite_open() when used procedurally. This parameter is not required when using the object-oriented method.
- query
-
The query to be executed.
- result_type
-
Parametrul opţional result_type acceptă o constantă şi determină cum masivul întors va fi indexat. Utilizând SQLITE_ASSOC vor fi întorşi numai indici asociativi (câmpuri denumite) în timp ce cu SQLITE_NUM vor fi întorşi numai indici numerici (numerele de ordine ale câmpurilor). Cu SQLITE_BOTH vor fi întorşi atât indici associativi, cât şi numerici. SQLITE_BOTH este valoarea implicită pentru această funcţie.
- error_msg
-
The specified variable will be filled if an error occurs. This is specially important because SQL syntax errors can't be fetched using the sqlite_last_error() function.
Notă: Două sintaxe alternative sunt susţinute pentru compatibilitate cu alte extensii de baze de date (cum ar fi MySQL). Forma preferată este cae dintâi, unde parametrul dbhandle este primul parametru pentru funcţie.
Valorile întroarse
This function will return a result handle or FALSE on failure. For queries that return rows, the result handle can then be used with functions such as sqlite_fetch_array() and sqlite_seek().
Regardless of the query type, this function will return FALSE if the query failed.
sqlite_query() returns a buffered, seekable result handle. This is useful for reasonably small queries where you need to be able to randomly access the rows. Buffered result handles will allocate memory to hold the entire result and will not return until it has been fetched. If you only need sequential access to the data, it is recommended that you use the much higher performance sqlite_unbuffered_query() instead.
Istoria schimbărilor
Istoria schimbărilor
NoteAvertizare
SQLite will execute multiple queries separated by semicolons, so you can use it to execute a batch of SQL that you have loaded from a file or have embedded in a script. However, this works only when the result of the function is not used - if it is used, only the first SQL statement would be executed. Function sqlite_exec() will always execute multiple SQL statements. When executing multiple queries, the return value of this function will be FALSE if there was an error, but undefined otherwise (it might be TRUE for success or it might return a result handle). |
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