I spent some time looking but cannot find one answer that satisfies what I am trying to accomplish.
I want to insert some explicitly stated values into table1 based on some condition in table2
The logic goes as follows:
INSERT INTO table1(col1, col2, col3)
VALUES(value1, value2, value3)
ONLY IF (SELECT attribute from table2 WHERE id=1) NOT LIKE 'A')
I NEED to explicitly insert the values and not INSERT SELECT from other table. Really appreciate it.
Edited following clarification from OP.
insert into table1(col1, col2, col3)
select value1, value2, value3
from dual
where (select attribute from table2 where id = 1) != 'A';
This assumes that table1 has exactly one row where id = 1, and the attribute is not null. For a slightly more general case, where there may be no row with id = 1, or there is one such row but the attribute can be null, you can write the where condition like so:
where nvl( (select attribute from table2 where id = 1), 'B' ) != 'A'
Related
I could not find a solution for this yet. I want to insert multiple rows with 2 or more different hardcoded values, but also with data that I get from another table.
Example: I want to add 2 items into a table for a user that has the ID = '0' in another table without running 2 queries.
This is what I've done so far:
INSERT INTO
DB.dbo.Table WITH(ROWLOCK, XLOCK) (
col1,
col2,
col3,
col4
)
SELECT
DISTINCT customer_id,
hardcoded_value1,
constant1,
constant2
FROM
DB.dbo.Other_Table
WHERE
ID = '0';
You could cross join your select query with a table value constructor that holds several records with harcoded values. This will generate as many rows as provided in the table value constructor for each row return by the query.
INSERT INTO
DB.dbo.Table WITH(ROWLOCK, XLOCK) (
col1,
col2,
col3,
col4
)
SELECT
DISTINCT t.customer_id,
x.hardcoded_value,
t.constant1,
t.onstant2
FROM DB.dbo.Other_Table t
CROSS JOIN (VALUES ('harcoded 1'), ('harcoded 2')) as x(hardcoded_value)
WHERE t.ID = '0';
I can't tell from your question what the basis is for the different values. You may be able to use a CASE statement to insert different hardcoded values based on some criteria:
INSERT INTO
DB.dbo.Table WITH(ROWLOCK, XLOCK) (
col1,
col2,
col3,
col4
)
SELECT
DISTINCT customer_id,
CASE WHEN Condition1 THEN hardcoded_value1
WHEN Condition2 THEN hardcoded_value2
...
END,
constant1,
constant2
FROM
DB.dbo.Other_Table
WHERE
ID = '0';
Good afternoon in my timezone.
i have to insert a row in a table but one of the columns are values from another table.So what i want to accomplish is something like this
INSERT TABLE_NAME(COL1,COL2,COL3,COL4) VALUES("VAL1","VAL2","VAL3",(SELECT COL_A FROM TABLE2 WHERE COL_B = 'X'))
But i think the above code is not possible so i use the following code:
INSERT INTO TABLE_NAME(COL1,COL2,COL3,COL4)
SELECT "COL1","COL2","COL3", COL_A FROM TABLE2 T2
WHERE COL_B= "X"
My question is:
I want to insert values even the select does not return values and in this case the COL4 will be NULL
How can i achieve this ?
Thanks in advance
Best regards
No, you cannot insert a row that is not in the table.
If you are expecting one row (in the case of a match), you can use aggregation:
INSERT INTO TABLE_NAME(COL1, COL2, COL3, COL4)
SELECT "COL1","COL2","COL3", MAX(COL_A)
FROM TABLE2 T2
WHERE COL_B = 'X';
This will return NULL if there is no match -- but only one row even if there are multiple matches in the table.
As i understood from your description, only one column is NULL, other 3 columns have values. You should use Select INTO as https://www.w3schools.com/sql/sql_select_into.asp
SELECT COL1,COL2,COL3,COL4 INTO TABLE2 FROM TABLE_NAME WHERE COL_B= "X"
You can create a temp table to store the primary keys of TABLE2 (for eg TABLE2 has primary key 'X', 'Y')
CREATE TABLE #TempPK (COLB int null);
insert into #TempPK(COLB) values ('X');
insert into #TempPK(COLB) values ('Y');
--then you do a FULL OUTER JOIN on your insert select from statement
INSERT INTO TABLE_NAME(COL1, COL2, COL3, COL4)
SELECT "COL1","COL2","COL3", MAX(COL_A)
FROM TABLE2 T2 FULL OUTER JOIN #TempPK TPK
ON T2.COL_B = TPK.COLB
This way you should be able to insert both rows(X and Y) and the Row X should show NULL values all across the row. Hope it makes sense.
I wanted to select the last record from the table1 and insert into another table .Here is my query.
Insert into table2 values(select top 1 col1,col2 from table1 order by id desc).
I know for adding the value into table,need to be in cotation.But where to add?
You can select literals to fill in the other columns that table1 can't provide, something like this:
insert into table2 (col_a, col_b, col_c, col_d)
select top 1 col1, col2, 'foo', 'bar'
from table1
order by id desc
Any columns you do not name in the column list will get the default value, or null if no default is defined.
The number and type of columns selected must match the number and type of columns in the insert column list.
In SQL, there are essentially basically two ways to INSERT data into a table: One is to insert it one row at a time, the other is to insert multiple rows at a time. Let's take a look at each of them individually:
INSERT INTO table_name (column1, column2, ...)
VALUES ('value1', 'value2', ...)
The second type of INSERT INTO allows us to insert multiple rows into a table. Unlike the previous example, where we insert a single row by specifying its values for all columns, we now use a SELECT statement to specify the data that we want to insert into the table. If you are thinking whether this means that you are using information from another table, you are correct. The syntax is as follows:
INSERT INTO table1 (column1, column2, ...)
SELECT t2.column3, t2.column4, ...
FROM table2 t2
So, in you case, you can do it like this:
Insert into table2
select top 1 t1.col1,t1.col2 from table1 t1 order by id desc
Or you can use your syntax like this:
declare #col1 type_of_col1, #col2 type_of_col2
select top 1 #col1 = t1.col1, #col2 = t1.col2 from table1 t1 order by id desc
Insert into table2 values(#col1, #col2)
Offcourse, this all works assuming that the column datatypes are matched.
I'm trying to insert data to a table from another table and the tables have only one column in common. The problem is, that the TABLE1 has columns that won't accept null values so I can't leave them empty and I can't get them from the TABLE2.
I have TABLE1:
id, col_1 (not null), col_2(not null), col_3 (not null)
and TABLE2:
id, col_a, col_b, col_c
so how could I insert id from TABLE2 to TABLE1 and fill the col_1-3 with hard coded strings like "data1", "data2", "data3"?
INSERT INTO TABLE1 (id) SELECT id FROM TABLE2 WHERE col_a = "something";
will result in:
ERROR: null value in column "col_1" violates not-null constraint
You can supply literal values in the SELECT:
INSERT INTO TABLE1 (id, col_1, col_2, col_3)
SELECT id, 'data1', 'data2', 'data3'
FROM TABLE2
WHERE col_a = 'something';
A select list can contain any value expression:
But the expressions in the select list do not have to reference any columns in the table expression of the FROM clause; they can be constant arithmetic expressions, for instance.
And a string literal is certainly a value expression.
For referential integtity :
insert into main_tbl (col1, ref1, ref2, createdby)
values ('col1_val',
(select ref1 from ref1_tbl where lookup_val = 'lookup1'),
(select ref2 from ref2_tbl where lookup_val = 'lookup2'),
'init-load'
);
Very late answer, but I think my answer is more straight forward for specific use cases where users want to simply insert (copy) data from table A into table B:
INSERT INTO table_b (col1, col2, col3, col4, col5, col6)
SELECT col1, 'str_val', int_val, col4, col5, col6
FROM table_a
You could use coalesce:
insert into destination select coalesce(field1,'somedata'),... from source;
Is it possible to do something like this:
INSERT INTO table(col1, col2) VALUES(something_from_another_table, value);
With something_from_another_table being a SQL command? Like, is there something I can do that's equivelant to:
INSERT INTO table(col1, col2) VALUES((SELECT value FROM table2 WHERE id = 3), value);
Yes
INSERT INTO table(col1, col2)
SELECT value1, 'value2' FROM table2 WHERE id = 3
Where value1 is the value from the 'other table' and value2 is a constant that you've included in that select statement.
Try this:
INSERT INTO table(col1, col2)
SELECT table2.value1, value2 FROM table2 WHERE table2.id = 3;
http://dev.mysql.com/doc/refman/5.1/en/insert-select.html
take a look especially in the examples.
I would recommend reading full syntax of SELECT, UPDATE, DELETE and INSERT SQL commands to begin with. Then expand to subqueries and DDL.
Go slowly and work out examples.
You definately can. It should work similar as the example below;
INSERT INTO Store_Information (store_name, Sales, Date)
(SELECT store_name, Sales, Date FROM Sales_Information WHERE Year(Date) = 2010)
when you specify the keyword "Values" on the insert statement you are trying to insert just a value. the current way to do that is assigning the value of the "something_from_another_table" into a variable and then, make your insert
DECLARE #ANYVALUE AS VARCHAR(40)
SELECT #ANYVALUE = ANYFIELD FROM table2 WHERE id = 3
INSERT INTO table1 (FIELD1, FIELD2) VALUES(#ANYVALUE, VALUE2)
On this way always will insert one record. the other correct way will insert n record as the where statement can filter.
INSERT INTO Store_Information (store_name, Sales, Date)
(SELECT store_name, Sales, Date FROM Sales_Information WHERE Year(Date) = 2010)