| 317 |
317 |
}
|
| 318 |
318 |
|
| 319 |
319 |
/**
|
|
320 |
* Selects the AVG() of a column name for a database query.
|
|
321 |
*
|
|
322 |
* @param string $column
|
|
323 |
* @param string $as
|
|
324 |
* @return Database_Core This Database object.
|
|
325 |
*/
|
|
326 |
public function selectavg($column, $as ='')
|
|
327 |
{
|
|
328 |
if( ! empty($as))
|
|
329 |
{
|
|
330 |
$as = ' AS ' . $this->driver->escape_str($as);
|
|
331 |
}
|
|
332 |
|
|
333 |
$column = $this->driver->escape_column($column);
|
|
334 |
$this->select[] = "AVG($column)" . $as;
|
|
335 |
|
|
336 |
return $this;
|
|
337 |
}
|
|
338 |
|
|
339 |
/**
|
|
340 |
* Selects the MAX() of a column name for a database query.
|
|
341 |
*
|
|
342 |
* @param string $column
|
|
343 |
* @param string $as
|
|
344 |
* @return Database_Core This Database object.
|
|
345 |
*/
|
|
346 |
public function selectmax($column, $as ='')
|
|
347 |
{
|
|
348 |
if( ! empty($as))
|
|
349 |
{
|
|
350 |
$as = ' AS ' . $this->driver->escape_str($as);
|
|
351 |
}
|
|
352 |
|
|
353 |
$column = $this->driver->escape_column($column);
|
|
354 |
$this->select[] = "MAX($column)" . $as;
|
|
355 |
|
|
356 |
return $this;
|
|
357 |
}
|
|
358 |
|
|
359 |
/**
|
|
360 |
* Selects the MIN() of a column name for a database query.
|
|
361 |
*
|
|
362 |
* @param string $column
|
|
363 |
* @param string $as
|
|
364 |
* @return Database_Core This Database object.
|
|
365 |
*/
|
|
366 |
public function selectmin($column, $as ='')
|
|
367 |
{
|
|
368 |
if( ! empty($as))
|
|
369 |
{
|
|
370 |
$as = ' AS ' . $this->driver->escape_str($as);
|
|
371 |
}
|
|
372 |
|
|
373 |
$column = $this->driver->escape_column($column);
|
|
374 |
$this->select[] = "MIN($column)" . $as;
|
|
375 |
|
|
376 |
return $this;
|
|
377 |
}
|
|
378 |
|
|
379 |
/**
|
|
380 |
* Selects the SUM() of a column name for a database query.
|
|
381 |
*
|
|
382 |
* @param string $column
|
|
383 |
* @param string $as
|
|
384 |
* @return Database_Core This Database object.
|
|
385 |
*/
|
|
386 |
public function selectsum($column, $as ='')
|
|
387 |
{
|
|
388 |
if( ! empty($as))
|
|
389 |
{
|
|
390 |
$as = ' AS ' . $this->driver->escape_str($as);
|
|
391 |
}
|
|
392 |
|
|
393 |
$column = $this->driver->escape_column($column);
|
|
394 |
$this->select[] = "SUM($column)" . $as;
|
|
395 |
|
|
396 |
return $this;
|
|
397 |
}
|
|
398 |
|
|
399 |
/**
|
| 320 |
400 |
* Selects the from table(s) for a database query.
|
| 321 |
401 |
*
|
| 322 |
402 |
* @param string string or array of tables to select
|