如果不添加新的 Ptnt_id 已经存在，我想更新一行

Question

如果 Ptnt_id 已经存在，我想更新一行，如果不添加新行

IF EXISTS (select * from `tbl_medicalhistory` where `Ptnt_id` =0) THEN
    update `tbl_medicalhistory` set `txt_tongue`= 'UPDATED' where `Ptnt_id` = 0;
  ELSE 
    INSERT INTO `tbl_medicalhistory`(`idMed`, `Ptnt_id`, `txt_tongue`, `txt_palate`, `txt_tonsil`, `txt_lips`, `txt_floorOfMouth`, `txt_cheeks`, `txt_allergy`, `txt_HeartDisease`, `txt_BloodDyscracia`, `txt_Diabetes`, `txt_kidney`, `txt_liver`, `txt_hygiene`, `txt_others`) VALUES (20],20,"This","New","Table","","","","","","","","","","","OTHERS");

idMed 将是主键，Ptnt_id 将是外键，所以如果 Ptnt_id 已经存在，它将只更新整行，否则它将添加具有新 idMed 和 Ptnt_id 的另一行 有人可以帮我写那个QUERY/PROCEDURE吗？

Answer 1

您可以使用INSERT ... ON DUPLICATE KEY UPDATE 语法。

上述查询的简化版本如下所示：

INSERT INTO `tbl_medicalhistory`(`idMed`, `Ptnt_id`, `txt_tongue`) 
VALUES (20,20,"This")

ON DUPLICATE KEY UPDATE `txt_tongue`="That";

鉴于 Ptnt_id 是 UNIQUE 或 PRIMARY 索引，将插入 Ptnt_id=20 不存在的行，否则如果该行存在，则更新其 txt_tongue 列。

Documentation

Answer 2

CREATE PROCEDURE [dbo].[PROCEDURE_NAME]
(
@Ptnt_id int
)
BEGIN
IF EXISTS (SELECT * FROM [dbo].[tbl_medicalhistory] WHERE Ptnt_id=@Ptnt_id)
BEGIN
UPDATE [dbo].[tbl_medicalhistory]
SET txt_tongue= 'UPDATED'
WHERE Ptnt_id=@Ptnt_id
END
ELSE
BEGIN
INSERT INTO [dbo].tbl_medicalhistory(idMed, Ptnt_id, txt_tongue, txt_palate, txt_tonsil, txt_lips, txt_floorOfMouth, txt_cheeks, txt_allergy, txt_HeartDisease, txt_BloodDyscracia, txt_Diabetes, txt_kidney, txt_liver, txt_hygiene, txt_others) VALUES (20,@Ptnt_id,"This","New","Table","","","","","","","","","","","OTHERS")
END
END

Answer 3

如果您想编写 c# 编码，这可能会对您有所帮助

patient_id="123"; 
string str1="";  
SqlConnection con=new SqlConnection(constr);
con.Open();
SqlCommand cmd=new SqlCommand("SELECT ptnt_id FROM TABLE  ", con);
SqlDataReader dr=cmd.ExecuteReader();
while(dr.Read())
{
string pid=dr[0].toString();
  if(patient_id == pid)
   {
     str1="true";
   }

}

if(str1 == true)
{
con.close();
con.open();
SqlCommand cmd1=new SqlCommand("UPDATE TABLE SET ..... WHERE ptnt_id='"+pid+"' ",con);
cmd.executeNonQuery();
}
else
{
con.close();
con.open();
SqlCommand cmd1=new SqlCommand("INSERT INTO TABLE VALUES .... ",con);
cmd.executeNonQuery();

}

Answer 4

根据您的要求更改变量数据类型

CREATE PROCEDURE [dbo].[PROCEDURE_NAME] (
    @Ptnt_id INT
    ,@idMed INT
    ,@Ptnt_id INT
    ,@txt_tongue NVARCHAR(50)
    ,@txt_palate NVARCHAR(50)
    ,@txt_tonsil NVARCHAR(50)
    ,@txt_lips NVARCHAR(50)
    ,@txt_floorOfMouth NVARCHAR(50)
    ,@txt_cheeks NVARCHAR(50)
    ,@txt_allergy NVARCHAR(50)
    ,@txt_HeartDisease NVARCHAR(50)
    ,@txt_BloodDyscracia NVARCHAR(50)
    ,@txt_Diabetes NVARCHAR(50)
    ,@txt_kidney NVARCHAR(50)
    ,@txt_liver NVARCHAR(50)
    ,@txt_hygiene NVARCHAR(50)
    ,@txt_others NVARCHAR(50)
    )

BEGIN
    IF EXISTS (
            SELECT 1
            FROM [dbo].[tbl_medicalhistory]
            WHERE Ptnt_id = @Ptnt_id
            )
    BEGIN
        UPDATE [dbo].[tbl_medicalhistory]
        SET txt_tongue = 'UPDATED'
        WHERE Ptnt_id = @Ptnt_id
    END
    ELSE
    BEGIN
        INSERT INTO [dbo].tbl_medicalhistory (
            idMed
            ,Ptnt_id
            ,txt_tongue
            ,txt_palate
            ,txt_tonsil
            ,txt_lips
            ,txt_floorOfMouth
            ,txt_cheeks
            ,txt_allergy
            ,txt_HeartDisease
            ,txt_BloodDyscracia
            ,txt_Diabetes
            ,txt_kidney
            ,txt_liver
            ,txt_hygiene
            ,txt_others
            )
        VALUES (
            20
            ,@Ptnt_id
            ,@idMed
            ,@Ptnt_id
            ,@txt_tongue
            ,@txt_palate
            ,@txt_tonsil
            ,@txt_lips
            ,@txt_floorOfMouth
            ,@txt_cheeks
            ,@txt_allergy
            ,@txt_HeartDisease
            ,@txt_BloodDyscracia
            ,@txt_Diabetes
            ,@txt_kidney
            ,@txt_liver
            ,@txt_hygiene
            ,@txt_others
            )
    END
END