I've added the column DVDAtTime and I'm and trying to insert values using a subquery. Seems rather straight forward but I keep getting an error that I can't insert null into (I believe) an unrelated field in the table. Ultimately, DVDAtTime should be the number shown in MembershipType
My code is as follows:
Insert Into Membership(DVDAtTime)
Select LEFT(MembershipType,1)
FROM Membership
I suspect you want to update each existing row, not insert new rows:
update membership
set DVDAtTime = left(MembershipType, 1)
Related
I have a vb.net application where datagridview is databound to sql table at design time(with table adapter and dataset). All I wanted is to get newly added row's Primary key(int) when i add new row to it. I have searched, but it's showing sql commands like below:
INSERT INTO #Customers
(Name)
VALUES ('Customer 1')
SELECT SCOPE_IDENTITY()
so using scope_identity(). But is there any way I can do it with adapter(or dataset) in vb.net or same command can be given though adapter or similar ?
Thanks in advance!
try this!
SCOPE_IDENTITY() will give you the last identity value inserted into any table directly within the current scope (scope = batch, stored procedure, etc. but not within, say, a trigger that was fired by the current scope)
Use the OUTPUT clause if you are inserting multiple rows and need to retrieve the set of IDs that were generated.
INSERT #a(x) OUTPUT inserted.identity_column VALUES('b'),('c');
--
result will be
1
2
New to sql statements etc and I have an issue with what i am doing using squirrelSQL on linux machine
I Created a table and used the following sql statements:-
INSERT INTO FIRSTTABLE VALUES
(11,'TEN','STEVE'),(21,'TWENTY','JO'),(31,'THIRTY','KIDS')
ALTER TABLE FIRSTTABLE
ADD SURNAME VARCHAR(15);
this works fine however when i attempt to insert data/values into the the surname row i keep experiencing errors, the SQL statement i am using is:-
INSERT INTO FIRSTTABLE (SURNAME)
VALUES ('THOMAS'),('THOMAS'),('THOMAS'),('THOMAS');
This particular statement returns the following error:-
Error: Column 'ID' cannot accept a NULL value.
SQLState: 23502
ErrorCode: 30000
I only wish to add data/values into the surname column,after creating a new column with the alter table statement, i have tried many different combinations including using a SELECT statement prior to the INSERT statement above which also gives errors any guidance will be greatly appreciated,
You are inserting into Surname, without assigning a value to the other fields. You are getting this error message because ID is blank, and should not.
Understand that INSERT creates new rows. If you wish to modify existing rows, use UPDATE
In this case you could use UPDATE FIRSTTABLE SET SURNAME='THOMAS';
Omitting the WHERE clause affects all the fields in the table.
Hope it helps, and good luck in your learning process!
The approach is wrong, you need to:
UPDATE FIRSTTABLE SET SURNAME='THOMAS' WHERE ID IN (11, 21, 31)
Inserting will add a new row to the table. So you need to update a row using
UPDATE FIRSTTABLE SET SURNAME="THOMAS" WHERE ID=11
I have a local db that I'm trying to insert multiple rows of data, but I do not want duplicates. I do not have a second db that I'm trying to insert from. I have an sql file. The structure is this for the db I'm inserting into:
(db)artists
(table)names-> ID | ArtistName | ArtistURL | Modified
I am trying to do this insertion:
INSERT names (ArtistName, Modified)
VALUES (name1, date),
(name2, date2),
...
(name40, date40)
The question is, how can I insert data and avoid duplication by checking a specific column to this list of data that I want inserted using SQL?
Duplicate what? Duplicate name? Duplicate row? I'll assume no dup ArtistName.
Have UNIQUE(ArtistName) (or PRIMARY KEY) on the table.
Use INSERT IGNORE instead of IGNORE.
(No LEFT JOIN, etc)
I ended up following the advice of #Hart CO a little bit by inserting all my values into a completely new table. Then I used this SQL statement:
SELECT ArtistName
FROM testing_table
WHERE !EXISTS
(SELECT ArtistName FROM names WHERE
testing_table.ArtistName = testing_table.ArtistName)
This gave me all my artist names that were in my data and not in the name table.
I then exported to an sql file and adjusted the INSERT a little bit to insert into the names table with the corresponding data.
INSERT IGNORE INTO `names` (ArtistName) VALUES
*all my values from the exported data*
Where (ArtistName) could have any of the data returned. For example,
(ArtistName, ArtistUrl, Modified). As long as the values returned from the export has 3 values.
This is probably not the most efficient, but it worked for what I was trying to do.
At work we have a SQL Server database. I don't know the db that well. I have created a new column in the table for some new functionality....straight away I have started seeing errors
My statement was this:
ALTER TABLE users
ADD locked varchar(50) NULL
GO
The error is:
Insert Error: Column name or number of supplied values does not match table definition
I have read that the error message appears when during an INSERT operation either the number of supplied column names or the number of supplied values does not match the table definition.
But I have checked so many times and i have changed the PHP code to include this columns data yet I still receive the error.
I have run the SQL query directly on the db and still get the error.
Funny enough the query which gets the error is an Update.
UPDATE "users"
SET "users"."date_last_login" = GETDATE()
WHERE id = 1
Have you considered it could be a trigger causing it?
This is the error message you would get.
If its an Update action causing it check trigger actions that Updates on that table run.
Do it with:
#sp_helptrigger Users, 'UPDATE';
This will show triggers occuring with ‘update’ actions.
If there is a trigger, grab the triggers name and run the below (but replace TriggerNameHere with real trigger):
#sp_helptext TriggerNameHere;
This will give you any SQL that the trigger runs and could be the INSERT the error message is referring to.
Hope this helps
Aside from TRIGGERS,
the reason for that is because you are using implicit type of INSERT statement. Let's say your previous number of columns on the table is 3. You have this syntax of INSERT statement,
INSERT INTO tableName VALUES ('val1','val2','val3')
which executes normally fine. But then you have altered the table to add another column. All of your INSERT queries are inserting only three values on the table which doesn't matches to the total number of columns.
In order to fix the problem, you have to update all INSERT statements to insert 4 values on the table,
INSERT INTO tableName VALUES ('val1','val2','val3', 'val4')
and it will normally work fine.
I'll advise you to use the EXPLICIT type of INSERT wherein you have to specify the columns you want to insert values with. Eg,
INSERT INTO tableName (col1, col2, col3) VALUES ('val1','val2','val3')
in this ways, even if you have altered your tables by adding additional columns, your INSERT statement won't be affected unless the column doesn't have a default value and which is non-nullable.
I've never created a trigger before and I'm trying to read online but am a little confused.
I want to create a trigger on a table that on insert, it will grab some data from different columns and insert it into a few different other tables.
I'm not sure how to write the T-SQL to get the data from the columns..
insert into [othetTable]
values ([col1 from row that was inserted], [col5 from row that was inserted])
What would the syntax be to get those values?
thanks
Use the inserted virtual table that is available to triggers. Note that there could be multiple rows in this table - your trigger could be processing multiple inserts at once.
Therefore, you need to use something like the following syntax:
insert into othertable
select col1, col5
from inserted
This will insert a row into othertable for each inserted row.