I need to update(or insert, I dont do a lot of sql work so I dont know which one I really need) some data in our database but its a multi tenant db and I am having trouble specifying which tenant I want to insert into. The current value in the column for this table is NULL. I need to add some data into that column
I need to do something like:
INSERT INTO Tenant(Address1) Values('5800 Nova Dr') WHERE TenantId='2'
Its the "WHERE" part that Azure Data Studio is not liking. Everything I found online was about inserting from another table. Any help would be appreciated!
you can use insert syntax to add a new row if you know the tenantId number
INSERT INTO Tenant(TenantId, Address1) Values(2, '5800 Nova Dr');
use update syntax if you have already prefilled the table row with null values
UPDATE Tenant SET Address1='5800 Nova Dr' WHERE TenantId=2
I think this should work if your table have an autoincrement value as primary key, otherwise you need to specify also the TenantID.
You can't use WHERE in insert, because is a new row.
INSERT INTO Tenant(Address1) values ('5800 Nova Dr')
If you want to update the value of already existing raw you can use
UPDATE Tenant SET Address1 = "5800 Nova Dr" WHERE Address1 like = '5800 Nova Dr'
UPDATE Tenant SET Address1='5800 Nova Dr' WHERE TenantId='2'
Related
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)
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've a table. In this table I have two columns - 'insert_name' and 'modified_name'. I need to insert into this columns data about who has inserted data into the table('insert_name') and who has changed these data in the table (modified_name). How it can be done?
You are looking for basic DML statements.
If your record is already in the table, then you need to UPDATE it. Otherwise, when you are about to add your record to it and it doesn't already exist in the destination table then you are looking for INSERT INTO statement.
Example of updating information for record with first id:
UPDATE yourtable SET insert_name = 'value1', modified_name = 'value2' WHERE id = 1
Example of inserting new record:
INSERT INTO yourtable(id, company_name, product_name, insert_name)
VALUES (1, 'Google', 'PC', 'value1')
If you are looking for automatic changes to those columns then you need to look into triggers.
Remember that more often than not you may find that the application connecting to the database is using single database user in which case you probably know the context within the application itself (who inserts, who updates). This does eliminate triggers and put the task straight on simple insert/update commands from within your application layer.
You might be able to use the CURRENT_USER function to find the name of the user making the change.
The value from this function could then be used to update the appropriate column. This update could be done as part of the INSERT or UPDATE statement. Alternatively use an INSERT or UPDATE trigger.
Personally I avoid triggers if I can.
For those 2 columns add Current_User as Default constraint.
As the first time Insert Statement will save them with current login user names. For update write an Update trigger with the same Current_User statement for the column Modified_Name.
If and only if your application business logic can't update the column modified_nme then only go for Trigger.
See the use of Current_Use
https://msdn.microsoft.com/en-us/library/ms176050.aspx
Is it possible to populate a second table when I insert into the first table?
Insert post to table1 -> table 2 column recieves table1 post's unique id.
What I got so far, am I on the right track?
CONSTRAINT [FK_dbo.Statistics_dbo.News_News_NewsID] FOREIGN KEY ([News_NewsID]) REFERENCES [dbo].[News] ([NewsID])
Lots of ways:
an insert trigger
read SCOPE_IDENTITY() after the first insert, and use it to do a second
use the output clause to do an insert
Examples:
1:
create trigger Foo_Insert on Foo after insert
as
begin
set nocount on
insert Bar(fooid)
select id from inserted
end
go
insert Foo (Name)
values ('abc');
2:
insert Foo (Name)
values ('abc');
declare #id int = SCOPE_IDENTITY();
insert Bar(fooid)
select #id
3:
insert Bar(fooid)
select id from (
insert Foo (Name)
output inserted.id
values ('abc')) x
The only thing I can think of is that you can use a trigger to accomplish this. There is nothing "built in" to SQL Server that would do it. Why not just do it from your .NET code?
Yes it is, it sounds like you want a SQL Trigger, this would allow you to trigger logic based on actions on one table, to perform other actions in the DB. Here's another article on creating Simple SQL Triggers
SQL Server 2008 - Help writing simple INSERT Trigger
A Word of caution, this will do all the logic of updating the new table, outside of any C# code you write, it might sound nice to not have to manage it upfront, but you also lose control over when and if it happens.
So if you need to do something different later, now you have to update your regular code, as well as the trigger code. This type of logic can definitely grow, in large systems, and become a nightmare to maintain. Consider this, the alternative would be to build a method that adds the id to the new table after it inserts into the first table.
While i don't know what you're using to do your inserts assuming it's a SQL Command you can get back the ID on an identity column from the insert using Scope_Identity, found here
How to insert a record and return the newly created ID using a single SqlCommand?
if it's EF or some other ORM tool, they should either automatically update the entity, or have other mechanisms to deliver this data.