sql if exists update else insert not working

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i have a table with 3 generic keys which are also foreign keys. This is my query --

        IF (EXISTS(SELECT * FROM table1 WHERE col_1 =4))
        BEGIN 
        UPDATE table1 
    SET col_2 = 3,
    col_3 = 100
        WHERE col_1 = 4 
        END
        ELSE 
        BEGIN
        INSERT INTO table1 
    (col_1, col_2, col_3) 
        VALUES(4, 2, 27)
        END

This gives me a syntax error. Engine used InnoDB. Collation: utf8_swedish_ci

I tried this too --

              INSERT INTO table1
    (col1, col2, col3)
     VALUES
    (:val1, :val2, :val3)
    ON DUPLICATE KEY UPDATE
    col2=:val2,
    col3=:val3

This doesn't work properly and only insert the rows inspite of having duplicate keys.

Generally for scenarios where you want to : "update/delete an existing record if present or insert a new row if the record doesn't exist" , you can use MERGE Command provided by Oracle.

Link : https://docs.oracle.com/cd/B19306_01/server.102/b14200/statements_9016.htm

PSB the below example provided by Oracle:

CREATE TABLE bonuses (employee_id NUMBER, bonus NUMBER DEFAULT 100);

INSERT INTO bonuses(employee_id)
   (SELECT e.employee_id FROM employees e, orders o
   WHERE e.employee_id = o.sales_rep_id
   GROUP BY e.employee_id); 

SELECT * FROM bonuses;

EMPLOYEE_ID      BONUS
----------- ----------
        153        100
        154        100
        155        100
        156        100
        158        100
        159        100
        160        100
        161        100
        163        100

MERGE INTO bonuses D
   USING (SELECT employee_id, salary, department_id FROM employees
   WHERE department_id = 80) S
   ON (D.employee_id = S.employee_id)
   WHEN MATCHED THEN UPDATE SET D.bonus = D.bonus + S.salary*.01
     DELETE WHERE (S.salary > 8000)
   WHEN NOT MATCHED THEN INSERT (D.employee_id, D.bonus)
     VALUES (S.employee_id, S.salary*0.1)
     WHERE (S.salary <= 8000);

EMPLOYEE_ID      BONUS
----------- ----------
        153        180
        154        175
        155        170
        159        180
        160        175
        161        170
        179        620
        173        610
        165        680
        166        640
        164        720
        172        730
        167        620
        171        740

SQL - IF EXISTS UPDATE ELSE INSERT Syntax Error, Would work with tbl_id and row_nr having UNIQUE key. This is the method DocJonas linked to with an example. If Row Exists Update, Else Insert in SQL Server A user mailed me a block of C# code that updated a row if it existed and inserted, if the row was new. He wanted the same code to be done in SQL Server as well.

Try this:

IF EXISTS (SELECT 1 FROM table1 WHERE col_1 = '4') THEN 
BEGIN 
    UPDATE assignment_question 
    SET col_2 = '3', col_3 = '100' 
    WHERE col_1 = '4';
END
ELSE 
BEGIN
    INSERT INTO table1 (col_1, col_2, col_3) 
    VALUES (4, 2, 27);
END

If exists then update else insert, Work on SQL Fiddle Only problem is, you can't use it like a normal query. delimiter $$ create procedure select_or_insert() begin IF EXISTS (select * from users where username = 'something') THEN update users set id=  Using NOT EXISTS for Inserts. The answer comes by understanding that SQL statements by themselves are a transaction. So within the same transaction as the insert we can determine if the cust_id already exists. I should mention there is one caveat for using this method. At least one record needs to exist in customer_totals. [cc lang=”sql”]

You can try the below code as an alternative to if exists

SELECT COUNT(*) INTO COUNT FROM TABLE1 WHERE COL_1 = '4'
IF (COUNT > 0) THEN
BEGIN 
 UPDATE TABLE1 SET COL_2 = '3', COL_3 = '100' WHERE COL_1 = '4';
END
ELSE
BEGIN
 INSERT INTO TABLE1 (COL_1, COL_2, COL_3) VALUES (4, 2, 27);
END

Hope this helps.

How to insert or update using single query?, You can try this. IF EXISTS(select * from test where id=30122) update test set name='john' where id=3012 ELSE insert into test(name) values('john');. To avoid this situation, usually, developers add T-SQL If Exists statement and drop the object if it is already available in the database. Let’s say we wish to deploy a stored procedure ‘stpGetAllMembers’ in the SQLShack test database.

DELIMITER //
CREATE PROCEDURE p()                                                                                                                                                                     
BEGIN
    IF EXISTS(SELECT * FROM table1 WHERE col_1 = 4) THEN
        UPDATE table1 SET col_2 = 3, col_3 = 100 WHERE col_1 = 4;
    ELSE
        INSERT INTO table1 VALUES(4, 2, 27);
    END IF;
END//
DELIMITER ;

Problems:

  1. there must be END IF for every IF statement;
  2. I created my procedure with mysql so according to documentation:

If you use the mysql client program to define a stored program containing semicolon characters, a problem arises. By default, mysql itself recognizes the semicolon as a statement delimiter, so you must redefine the delimiter temporarily to cause mysql to pass the entire stored program definition to the server.

Sql if exists update else insert multiple rows, Sql if exists update else insert multiple rows. text present in dgv son update number cell with new value + present value problem is how to do soi want to exists  In MS Access I can do in one SQL statement a update if exists else a insert. (snip)This query will add a record in SOURCE into DEST if that record does not exist in DEST else it does a update. This query however does not

try to put THEN before BEGIN also try to put END IF after the last row

hope this work :

    IF (EXISTS(SELECT * FROM table1 WHERE col_1 =4)) **THEN**
    BEGIN 
    UPDATE table1 
SET col_2 = 3,
col_3 = 100
    WHERE col_1 = 4 
    END
    ELSE 
    BEGIN
    INSERT INTO table1 
(col_1, col_2, col_3) 
    VALUES(4, 2, 27)
    END
    **END IF**

How to INSERT If Row Does Not Exist (UPSERT) in MySQL, Learn how to INSERT an If Row Does Not Exist (UPSERT) in MySQL. MySQL Using INSERT ON DUPLICATE KEY UPDATE For example, our books table might contain a few records already: With our visual version of SQL, now anyone at your company can query data from almost any source—no coding required. MySQL insert row if not exists else update record This PDO statement will update the record if a combination of user_id and product_code exists by adding supplied quantity to existing quantity and updating added_on field. Otherwise will add a new row with given values.

UPSERT - Update else Insert in Informatica, If a new record arrives the UPDATE will fail since PRIMARY KEY values in target port are not matching. 4. The new record will be inserted to the table at last. This  There is slight change in Query, Just try to select the record first which you want to insert in database, if it is not exist then you can insert in it.

check if record exists then update else insert – SQLServerCentral, I have to check if this exists in table, if it does not exist only then insert. I cannot use MERGE as it is giving me trigger issues and I tried using if exists(below is my code) to check if record exists in table , if there is record then update else insert​. Only issue I have with this code is the SQL-89 style joins. Often you have the situation that you need to check if an table entry exists, before you can make an update. If it does not exist, you have to do an insert first. The simple straightforward approach is this: (The example is for an entry in the WordPress wp_postmeta table)

SQL Server: MERGE (AKA UPSERT) =(INSERT / UPDATE / DELETE), 4. IF (Key Exists). UPDATE row for key. ELSE. INSERT new row with Let us see the MERGE statement in action with a SQL Server example  2. when the "Update Else Insert" session property is set along with "Treat Source Rows as Updates": load time is 176 seconds. 3. when the Target Table pre-SQL is defined with a DELETE SQL along with "Treat Source Rows as Inserts": load time is 120 seconds. The first approach cannot be used since the flat file is an incremental.

Comments
  • Why don't you just do an INSERT with ON DUPLICATE KEY UPDATE?
  • @Barmar i tried that but it doesnt work. Documents said it will cause errors in presence of multiple keys
  • in mysql there is an replace. you can may use this
  • Why do you use characters for the comparisons, but numbers for the insert? What's the type of the columns? Note, unless you execute this in a transaction (and lock the entire table), you might get some funny results.
  • @Clockwork-Muse : datatypes aint an issue. I have edited to avoid confusion.
  • I was about to suggest the same to OP. Merge is also there in SQL
  • @user983983 You can use * instead of 1 but for performance do not use *. Both will work same
  • Why do you think this will solve the problem, if * should work?
  • For that matter, where are you getting assignment_question? This still appears to throw the same syntax error, anyways.