I have to change the values in my table and create an temporary table from that. But not with UPDATE, since I have to keep the original table.
for example a table like Table(id, date), I have to create a temp table by changing the date values. The ones which are NULL must be CURRENT_DATE().
How can I manage that??
Create temporary table with (id,date)
then
INSERT INTO tempoaryTable (id,date)
SELECT id, IFNULL(date,CURRENT_DATE())
FROM yourTable
You can use INSERT-SELECT form to copy all values from original table to temporary, setting corresponding field to CURRENT_DATE().
Syntax might be off as I don't now mysql
insert into temp_table
select id,coalesce(date,current_date) from mytable
Related
I have crate a db in MySQL which has a lot of tables. I want the value of one table to be automatically saved on another table too.
For example I write something on: table1.lastname, I want this to be also stored in table2.lastname .
How is this called and how I can do that with PHP My Admin?
CREATE TABLE new_table_name LIKE old_table_name
Create trigger after_insert on new_table
like this
CREATE TRIGGER `AFTER_INSERT` AFTER INSERT ON `new_table_name` FOR EACH ROW BEGIN
insert into new_table_name (column_names) values (column_values) ;
END
For first you must create table for data store.
Then you must create trigger on wanted table for catch event and insert data in early created table.
This will do what you want:
INSERT INTO table2 (lastname)
SELECT lastname
FROM table1
If you want to include all rows from table1. Otherwise you can add a WHERE statement to the end if you want to add only a subset of table1.
I hope this helps.
If the table doesn't exist, you can create one with the same schema like so:
CREATE TABLE table2 LIKE table1;
Then, to copy the data over:
INSERT INTO table2 SELECT * FROM table1
Or If the tables have different structures you can also:
INSERT INTO table2 (`col1`,`col2`) SELECT `col1`,`col2` FROM table1;
EDIT: to constrain this..
INSERT INTO table2 (`col1_`,`col2_`) SELECT `col1`,`col2` FROM
table1 WHERE `foo`=1
I am trying to insert my values into table if Admin_User_Role_Id value against Admin_Id is not present in the table. Is it possible to insert!
My Table Structure:
Admin_User_Id (FK)
Admin_User_Role_Id (FK)
Is_Enabled (boolean flag)
Query which I tried, but not success
INSERT INTO role_association
SET Admin_User_Id=61, Admin_User_Role_Id=2, Is_Enabled=0
WHERE Admin_User_Role_Id
NOT IN
(SELECT Admin_User_Id, Admin_User_Role_Id FROM role_association)
I think it is possible but my logic is wrong. How should I manage this query to work successfully!
INSERT syntax cannot have WHERE clause. The only time you will find INSERT has WHERE clause is when you are using INSERT INTO...SELECT statement.
Probably you take care about where condition in your programming logic and write a simple insert statement and the depending on your logic use this statement to insert the records. Hope you got my point.
You want to insert your values in your table using this query for your reference
INSERT INTO Yourtablename(column1,column2,column3,...)
VALUES ('value1','value2','value3',.....);
You want to ADD one new column in your table means using this query
** ALTER TABLE table_name ADD column_name datatype**
I need two id columns in the same table that create unique values upon insert. Since MySQL allows only one column to auto-increment, I need to do something like max(id)+1 for the other column.
Here's the SQL I expected to work:
INSERT INTO invoices (invoiceid)
VALUES ((SELECT MAX(invoiceid)+1 FROM invoices))
The select statement works independently, but within my INSERT, it's not allowed. I get the error : You can't specify target table 'invoices' for update in FROM clause
You want to use INSERT INTO .... SELECT FROM instead of INSERT INTO...VALUES():
INSERT INTO invoices (invoiceid)
SELECT MAX(invoiceid)+1
FROM invoices
My question for you would be why are you not use an AUTO INCREMENT field to generate the invoiceid value? That is what it is for, then you will not have to create this when inserting data.
I have been looking for a way to duplicate a row, and insert it back to the table, but with a different id value (whose type is auto increment).
I could do this by specifying every column manually, but as there are many columns, and as the columns can be added or removed in the future, I want to use some easy query to do this without having to specify every column name.
Try this:
CREATE TEMPORARY TABLE temp_table SELECT * FROM source_table WHERE ...;
ALTER TABLE temp_table DROP COLUMN column_with_auto_increment;
INSERT INTO source_table SELECT * from temp_table; DROP TABLE temp_table;
Try
INSERT INTO new_table (attr1, attr2, attr3) SELECT oldatr1, oldatr2, oldatr3 FROM old_table WHERE <the filter you want>
It also may work if new_table and old_table are the same.
How to store results from following query into another table. Considering there is an appropriate table already created.
SELECT labels.label,shortabstracts.ShortAbstract,images.LinkToImage,types.Type
FROM ner.images,ner.labels,ner.shortabstracts,ner.types
WHERE
labels.Resource=images.Resource
AND labels.Resource=shortabstracts.Resource
AND labels.Resource=types.Resource;
If the table doesn't exist (and you e.g. don't want to create it because it may have lots of column names) you can create it on the fly...
Query:
CREATE TABLE another_table SELECT /* your query goes here */
You can use the INSERT INTO TABLE SELECT....syntax:
INSERT INTO new_table_name
SELECT labels.label,shortabstracts.ShortAbstract,images.LinkToImage,types.Type
FROM ner.images,ner.labels,ner.shortabstracts,ner.types
WHERE labels.Resource=images.Resource AND labels.Resource=shortabstracts.Resource
AND labels.Resource=types.Resource;
if your table dosen't exist then
CREATE TABLE new_table SELECT //write your query here
if your table exist then you can just insert query
INSERT INTO new_table SELECT //write your query here
For more check here and here
INSERT INTO another_table SELECT /*your query goes here*/
In SQLite Studio, I noticed that "AS" keyword is needed:
Query:
CREATE TABLE another_table AS SELECT /* your query goes here */