Method functionAs

APIJSONORM/src/main/java/apijson/SQL.java:271–273

有别名的函数 @param column @return #function(String, String) + #AS + fun;

(String fun, String column)

	 * @return {@link #function(String, String)} + {@link #AS} + fun;
	 */
	public static String functionAs(String fun, String column) {
		return function(fun, column) + AS + fun + " ";
	}

	/**计数
	 * column = null