I have a table with 4 columns, say COLA,COLB,COLC,COLD. COLC and COLD are computed columns.
Suppose I want to insert a row into table, should the query be something like
insert into Table (COLA,COLB,COLC,COLD) values (1,2,'','')?
I know I can't insert into computed columns. But how can I add a row and keep the default computed columns as they are?
Thanks for any advice!
try this
INSERT INTO TABLE (COLA,COLB) values (1,2);
you dont need to provide the values even blanks for computed column. They get calculated automatically
Just specify the columns you want to insert values into:
insert into Table (COLA,COLB) values (1,2)
Just don't specify the calculated columns:
insert into Table (COLA,COLB) values (1,2)
Thank you all! I just got that out too! Previously I got errors that number of col don't match, because I missed a a column.
Related
Sorry if you think my question is too basic, because i'm a newbie.
Lets say i have 1000 lines of query like this
INSERT INTO table (column1,column2,column3) VALUES (1,2,3);
INSERT INTO table (column1,column2,column3) VALUES (3,33,333);
....
I want to delete column2 with its value, Is there any way so that i dont need to delete 1000 rows manualy. Thanks.
Perhaps you want to completely drop the second column:
ALTER TABLE yourTable DROP COLUMN column2;
Although you may have used many statements to build up the data in your table, dropping a particular column only requires a one-liner.
Hey ya'll I have this insert statement here
INSERT INTO persons VALUES (16,'First Name',NULL,NULL,NULL,2,0,now(),NULL,NULL);
it says that the number of columns do not match because the last column is for the id which is auto incremented. do I have to put in an id value?
Thanks,
J
You should not include an Auto-increment column in your insert.
It is also best practice to put the column names after the table name. This helps to make the query cleaner and easier to read & maintain.
INSERT INTO persons(Column1, col2, ...)
VALUES (16, 'First Name', ...)
Just don't include that field
INSERT INTO persons VALUES (16,'First Name',NULL,NULL,NULL,2,0,now(),NULL);
I'm new to SQL, (using SQL 2008 R2) and I am having trouble inserting multiple rows into a single column.
I have a table named Data and this is what I am trying
INSERT INTO Data ( Col1 ) VALUES
('Hello', 'World')
That code was taken from this question, but it, like many other examples I have found on the web uses 2 columns, I just want to use 1. What am I doing wrong?
Thanks
To insert into only one column, use only one piece of data:
INSERT INTO Data ( Col1 ) VALUES
('Hello World');
Alternatively, to insert multiple records, separate the inserts:
INSERT INTO Data ( Col1 ) VALUES
('Hello'),
('World');
to insert values for a particular column with other columns remain same:-
INSERT INTO `table_name`(col1,col2,col3)
VALUES (1,'val1',0),(1,'val2',0),(1,'val3',0)
I believe this should work for inserting multiple rows:
INSERT INTO Data ( Col1 ) VALUES
('Hello'), ('World'),...
Another way to do this is with union:
INSERT INTO Data ( Col1 )
select 'hello'
union
select 'world'
If your DBMS supports the notation, you need a separate set of parentheses for each row:
INSERT INTO Data(Col1) VALUES ('Hello'), ('World');
The cross-referenced question shows examples for inserting into two columns.
Alternatively, every SQL DBMS supports the notation using separate statements, one for each row to be inserted:
INSERT INTO Data (Col1) VALUES ('Hello');
INSERT INTO Data (Col1) VALUES ('World');
INSERT INTO Data ( Col1 ) VALUES ('Hello'), ('World')
In that code you are inserting two column value.
You can try this
INSERT INTO Data ( Col1 ) VALUES ('Hello'),
INSERT INTO Data ( Col1 ) VALUES ('World')
Kindly ensure, the other columns are not constrained to accept Not null values, hence while creating columns in table just ignore "Not Null" syntax. eg
Create Table Table_Name(
col1 DataType,
col2 DataType);
You can then insert multiple row values in any of the columns you want to.
For instance:
Insert Into TableName(columnname)
values
(x),
(y),
(z);
and so on…
Hope this helps.
INSERT INTO hr.employees (location_id) VALUE (1000) WHERE first_name LIKE '%D%';
let me know if there is any problem in this statement.
I need to create a table that basically keeps a list of indices only. Therefore I've created a table with just one, auto-incremented column called 'id'. However, I can't seem to implicitly add auto-incremented values to this table.
I know that usually when you have such a column in a table (with more than just this column) you can do:
INSERT INTO TABLE (col1, col2 ...) VALUES (val1, val2 ...)
And if you don't specify the auto-incremented column, it would automatically get a value. However, things like:
INSERT INTO TABLE () VALUES ()
INSERT INTO TABLE
INSERT INTO TABLE ()
etc. all produce an error on my single-columned table. Can anyone offer a solution?
Thanks.
p.s. I'm using Sqlite, in case it matters.
Try this
INSERT INTO dbo.Table DEFAULT VALUES
See this answer:
Previous answer
Try the following:
INSERT INTO YOUR_TABLE(YOUR_ID) VALUES (NULL);
I am trying to add an additional column and value to an existing insert query - both integers, and running into trouble.
Anything to look out for?
you don't give much to go in in your question:
I am trying to add an additional
column and value to an existing insert
query - both integers, and running
into trouble.
Anything to look out for?
it is best practice to list all columns you intend to include values for in the list of columns, so make sure you add them there, as well as the VALUES list:
insert into YourTable (col1, col2,..., newCol1, newCol2)
VALUES (1,2,...,new1, new2)
make sure the you get the column names spelled correct and that the table actually has those new columns in it.
make sure the column name sequence is the same as your insert data sequence.
Example
INSERT INTO TABLENAME
(ColumnName1,ColumnName2) VALUES (1,'data')
Becomes
INSERT INTO TABLENAME
(ColumnName1,ColumnName2,ColumnNameNEW) VALUES (1,'data','newcolumndata')
Notice both the new column name and the new data are in the third position in the sequence.