In master table I have two field named 'id-->AutpIncrement,Primary key','designation-->varchar'.In registration table 'designation-->INT,Foreign key of Id in designation table'.Now what I have to do is that I have to fire select query i.e. select id from designation where name=;something like this and than have to store it using String.getParameter.After doing all this have to pass result set query
i.e. rs.getInt(1);
and finally int id have to insert.
And one thing more in registration form designation is in drop down menu and done coding as dynamic means designation details appear on the web browser by fetching information from database.
Please help me in code for select and than passing information by insert as I have defined in first paragraph .
Related
I just was wondering if is it possible to associate an user to the data inserted in a table.
For example:
I have a table Customers with columns customerID, name and address. Is there any method in MySql to know what user has inserted each row in the table or must I add a column userID in the table Customer to add the user in my SQL Insert statement?.
If I have only one table, it is not a proble to add the userID column. But when i have multiple tables, maybe it becomes a messy task.
Thanx in advance.
If you are trying to find out the user_id caused the insert then NO, there is no other way than you storing it explicitly likewise you already have thought of.
If there is multiple tables for which you want to store the same information; then you can probably have a separate table where you can have the user_id column and can use a AFTER INSERT TRIGGER to insert the user id in this table.
No, no such functionality is provided by MySQL. You'll have to add a column for user_id in your table(s) and insert the user id yourself.
I'm planning to log referral clicks in mysql by the country of the IP.
Let's say my table is named referral_clicks and has the columns id, referral_id, country.
I have 2 approaches in mind now:
Create another column clicks which is set to +1 for every country / referral_id. This means that I would have to check first if the row for the specific referral_id and country already exists and if not, create it.
Insert a new row for every request. My concern here is, that the table might geht messy and too big, as might get very much referral requests.
What would be the best approach now for something like that, or is there evern a better approach?
Use INSERT ... ON DUPLICATE KEY UPDATE.
I suggest you create a table with the following columns.
id (autoincrement)
referral_id
country
clickdate
clicks
I suggest you create a unique index of (referral_id,country,clickdate).
Then, I suggest you use the following SQL each time you want to log a click:
INSERT INTO referral_clicks (referral_id, country, clickdate, clicks)
VALUES ('whatever', 'whatcountry', CURDATE(), 1)
ON DUPLICATE KEY UPDATE clicks=click+1
This will start a new row for each referral id, for each country, for each date. If the row already exists it will increment clicks for you.
I need to append the data to a Access Table ULAE. I wants parameters to be picked from another table LAE.This table has 4 columns(Group,le,qtr,Table name) that will be an input and some parameters will be part of where condition. However there is one column table name that will have linked tables. Is it possible to pick the table name (that would be a linked table in the same access file, from where the data would be appended to ULAE).Is it possible to implement this in MSquery?
What i need is to pick the table name from LAE and append the data into ULAE from the table name specified in the LAE.
my query is like
INSERT INTO ULAE( vdate, profile_id, le, ibu)
SELECT PERSIAN.vdate, PERSIAN.profile_id, PERSIAN.le, PERSIAN.ibu
FROM **PERSIAN**;
**Persion is the linked table name coming from LAE**
Thanks in advance.
I have table Context and Criteria with many-to-many relationship, so I created DetailsContext table that stored ID from each table.
Then, Context table is empty and Criteria is master table
I have form to insert a context, firstly I inserted Context table to get an ID (autoincrement) than I selected ID table Context and Criteria by order ID DESC to get latest ID. Then I inserted to DetailsContext table.
Is't ok I just use SELECT ID FROM CONTEXT ORDER BY ID DESC to get latest ID? I afraid it didn't work when many users is accessed together.
If I understand your question correctly, then according to MySQL documentation, you can get the last ID that was inserted into the table with SELECT LAST_INSERT_ID() as long as the id is autogenerated and you are inserting one row per INSERT statement.
(MySQL) I am trying to migrate a "subscription" table into 3 new tables: "product", "subscription", "actual" where "actual" is the name of the actual product, say, newsletter. The subscription has a FK reference to product and the actual has FK reference into subscription.
I know the INSERT INTO SELECT statement can copy data probably from many table to one; is there a statement to do the opposite, one to many tables for my case?
I'm not aware of an SQL statement that will do what you want. Just do several INSERT INTO SELECTs one after the other. It may be faster to do them one at a time anyway.
I think you can use three seperate insert into select statements. First you convert the product table, then the subscription where you can use an embedded select to find the id in the product table:
insert into subscription (some_column, FK_id,...)
select something, (select id from product where <your where clause>),...
and finally convert the actual table using an embedded select to get the id from the subscription table.