SQL判断一个表在系统中是否存在

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/**
     * 判断某张表是否存在
     * @param tabName 表名
     * @return
     */
    public boolean tabbleIsExist(String tableName){
            boolean result = false;
            if(tableName == null){
                    return false;
            }
            SQLiteDatabase db = null;
            Cursor cursor = null;
            try {
                    db = this.getReadableDatabase();
                    String sql = "select count(*) as c from "+AppConstant.DataBaseName+" where type =''table'' and name =''"+tableName.trim()+"'' ";
                    cursor = db.rawQuery(sql, null);
                    if(cursor.moveToNext()){
                            int count = cursor.getInt(0);
                            if(count>0){
                                    result = true;
                            }
                    }
                    
            } catch (Exception e) {
                    // TODO: handle exception
            }               
            return result;
    }

 以上就可以用来判断一个表是否在系统中存在了！