我正在尝试SELECT * FROM user_settings
LEFT JOIN
CASE
WHEN invoice_address = 0 THEN companies
WHEN invoice_address = 1 THEN users
END AS table_to_join
ON table_to_join.id = invoice_id
WHERE user_settings.user_id = :id
基于列值的表格。
SQL我试过：
if($results['invoice_address'] == "0"){
$sql = "SELECT * FROM users WHERE user_id = :id";
}else if($results['invoice_address'] == "1"){
$sql = "SELECT * FROM companies WHERE user_id = :id"
}
目前，我使用PHP检查值是否等于某事，然后执行第二个查询：
string json;
IList<double> d = new List<double> {1.1, double.NaN, double.PositiveInfinity};
json = JsonConvert.SerializeObject(d);
// [1.1,"NaN","Infinity"]
json = JsonConvert.SerializeObject(d, new JsonSerializerSettings {FloatFormatHandling = FloatFormatHandling.Symbol});
// [1.1,NaN,Infinity]
json = JsonConvert.SerializeObject(d, new JsonSerializerSettings {FloatFormatHandling = FloatFormatHandling.DefaultValue});
// [1.1,0.0,0.0]