I need a SQL which do following work.
INSERT INTO table_1 (column1, column2, column3) VALUES (:1,:2, :3)
This insert will only happen when another condition is TRUE, the
condition is:
SELECT 1 FROM table_2 WHERE column_time = 'time_stamp'
Table_1 and table_2 dont have any relation. the INSERT values to table_1 should only happen if the query on Table_2 return TRUE(1)
So i try to write my SQL as following
INSERT INTO table_1 (column1, column2, column3) VALUES (:1,:2, :3)
WHERE EXISTS (SELECT 1 FROM table_2 WHERE column_time = 'time_stamp')
ON CONFLICT DO NOTHING
However, this SQL not work as Postgresql looks dont like the INSERT combine with WHERE condition.
BTW: the values (:1, :2:, :3) are bind array values. the final SQL looks like this:
INSERT INTO table_1 (column1, column2, column3) VALUES ('ca_1','cb_1', 'cc_1') ('ca_2','cb_2', 'cc_2') ... ('ca_n','cb_n', 'cc_n') WHERE EXISTS (SELECT 1 FROM table_2 WHERE column_time = 'my_time_stamp') ON CONFLICT DO NOTHING
Really need help thanks.
You need to select those values.
This would work in Postgres:
INSERT INTO table_1 (column1, column2, column3)
SELECT :1, :2, :3
WHERE EXISTS (SELECT 1 FROM table_2 WHERE column_time = 'time_stamp')
ON CONFLICT DO NOTHING
Alternatively:
INSERT INTO table_1 (column1, column2, column3)
SELECT x.*
FROM (VALUES (:1, :2, :3)) AS x(column1, column2, column3)
WHERE EXISTS (SELECT 1 FROM table_2 WHERE column_time = 'time_stamp')
ON CONFLICT DO NOTHING
Related
Randomly decided to dive into some SQL reading.
Can I write a DELETE statement just like a INSERT statement?
example
INSERT TABLES table (column1, column2)
VALUES ('cell1', 'cell2);
DELETE FROM table (column1, column2)
WHERE ('value', 'value');
instead of
DELETE FROM table
WHERE column1 = 'value', column2 = 'value';
Neither of those statements is valid. You can write:
DELETE FROM table
WHERE column1 = 'value' and column2 = 'value';
Some databases allow:
DELETE FROM table
WHERE (column1, column2) = ('value', 'value');
I know that you can insert multiple rows in a query by using
INSERT ALL
INTO mytable (column1, column2, column_n) VALUES (?,?,?)
INTO mytable (column1, column2, column_n) VALUES (?,?,?)
INTO mytable (column1, column2, column_n) VALUES (?,?,?)
SELECT * FROM dual;
Is there a way for update as well based on a value? So it would be something like
UPDATE ALL
SET mytable (column1, column2, column_n) VALUES (?,?,?)
SET mytable (column1, column2, column_n) VALUES (?,?,?)
SET mytable (column1, column2, column_n) VALUES (?,?,?)
WHERE ID= ?
SELECT * FROM dual;
For instance i have a reviewtable
reviewid bookid authorname authoremail
1 1 peter wdwdd
2 1 jane dwdwdw
3 1 mary dwdw
Is it possible to do a multiple update where bookid = "1" ?
You can use MERGE:
MERGE INTO reviewtable r
USING ( SELECT 1 AS reviewid,
1 AS bookid,
'peter smith' AS name,
'p.smith#email' AS email
FROM DUAL
UNION ALL
SELECT 2, 1, 'jane blogs', 'j.blogs#email' FROM DUAL
UNION ALL
SELECT 3, 1, 'mary adams', 'm.adams#email' FROM DUAL
) src
ON ( r.bookid = src.bookid AND r.reviewid = src.reviewid )
WHEN MATCHED THEN UPDATE
SET authorname = src.name,
authoremail = src.email;
Is it possible for an INSERT query to subtract 2 values you have entered to create a 3rd value that can then be inserted into a table - if that makes sense...
e.g.
INSERT INTO table1 (column1, column2, column3)
VALUES ('50', '25', column1 - column2)
INSERT INTO table1 (column1, column2, column3)
(select ('50', '25', column1 - column2) from table1 where conditions)
This is a sample query! hope it helps!
Convoluted:
INSERT INTO table1 (column1,column2,column3)
select column1,column2,column1-column2
from
(select 50 as column1,
25 as column2
) t
Since you can't reference other columns from the same SELECT clause, you have to do it as a subquery. I've also switched to using int literals rather than strings, because I can't make subtraction make sense in my head otherwise.
You could also do it using a Table Value Constructor:
INSERT INTO table1 (column1,column2,column3)
select column1,column2,column1-column2
from
( VALUES (50, 25)
) AS t (column1, column2);
As indicated in my comment though, if the relationship should always hold, I'd build table1 as:
CREATE TABLE table1 (
column1 int not null,
column2 int not null,
column3 as column1 - column2
--More columns
)
Because that way, the column3 value is always correct.
You can create function that subtracts values and use this function in insert. This is the right way to do such things:
INSERT INTO table1 (column1, column2, column3)
(select ('50', '25', your_function() ) from table1 where conditions)
/
Using the "INSERT INTO" would do this:
INSERT INTO Table1Name (column1, column2, column3,)
(select 'X', 'Y', X - Y as Z)
Here is a link to SQL Authority with more examples of INSERT INTO
Another method would to be add a trigger to the table, where on insert of data, the third column would be updated with the difference of the first two columns.
I want to return a temporary table from stored procedure which populates with data retrieved from two independent sql query
Select column1,column2 FROM TABLE1 WHERE someCondition
Select column3,column4 FROM TABLE1 WHERE someOtherCondition
INSERT INTO Temp_table(column1,column2,column3,column4) values VALUE from those two table
Some of the result from table contains null as well.Also i am using some mathematical function like sum on some column as well
Thanks in advance
Try out with following code:
INSERT INTO Temp_table (column1, column2, column3, column4)
SELECT column1, column2, ISNULL(column3,0), ISNULL(column4,0) FROM TABLE1 WHERE someCondition
UNION ALL
SELECT ISNULL(column1,0), ISNULL(column2,0), column3, column4 FROM TABLE1 WHERE someOtherCondition
You want to do something like:
INSERT INTO Temp_table (column1, column2, column3, column4)
SELECT column1, column2, NULL AS column3, NULL AS column4 FROM TABLE1 WHERE someCondition
UNION
SELECT NULL AS column1, NULL AS column2, column3, column4 FROM TABLE1 WHERE someOtherCondition
Is it possible to insert more than one row in a table with one insert statement?
I know this will happen if I do:
insert into table ( fields ) select values from another_table
But what if I want to insert:
row 1 - ( a1, b1, c1 )
row 2 - ( a2, b2, c2 )
...
row n - ( an, bn, cn )
with just one insert command?
Two solutions (source : http://appsfr.free.fr/spip.php?article21 ):
INSERT ALL
INTO table (column1, column2)
VALUES (value1, value2)
INTO table (column1, column2)
VALUES (value1, value2)
...etc...
SELECT * FROM DUAL ;
or
INSERT INTO table (column1, column2)
SELECT value1, value2 FROM DUAL UNION ALL
SELECT value1, value2 FROM DUAL UNION ALL
...etc...
SELECT value1, value2 FROM DUAL ;
Insert All
INSERT ALL
INTO mytable (column1, column2, column3) VALUES ('val1.1', 'val1.2', 'val1.3')
INTO mytable (column1, column2, column3) VALUES ('val2.1', 'val2.2', 'val2.3')
INTO mytable (column1, column2, column3) VALUES ('val3.1', 'val3.2', 'val3.3')
SELECT * FROM dual;
INSERT INTO products (product_no, name, price) VALUES
(1, 'Cheese', 9.99),
(2, 'Bread', 1.99),
(3, 'Milk', 2.99);
INSERT INTO College (CustomerID, FirstName, MiddleName, LastName)
SELECT 7, N'Charles', N'Simmons', N'Burns'
UNION ALL
SELECT 9, N'Dominic', N'Fred', N'Einsten'
UNION ALL
SELECT 12, N'Dave', N'William, N'Bryan';
NOTE:
Letter N before each hard coded string value converts string to an NVARCHAR value to match the datatype of the column.
No, this is not possible. As you already stated yourself, it is only possible with a select clause providing the insert values and rows.