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Posted by / 29-Feb-2020 12:16

Updating rows in mysql

There are other issues but, I got confused with the table names.

bazz My answers are in one table (table_foobar), and does use a FK(question_id) to relate them to the questions table (table_questions).

Here is my example..normal update command would be: // question ID ranges from 1-20 // $questionid == 1, $member_id==1 UPDATE table_Foo Bar SET answer One='$ans1Val', answer Two='$ans2Val', answer Three='$ans3Val' WHERE member_id='$memberid' AND question_id='$questionid'; // $questionid == 2, $member_id==1 UPDATE table_Foo Bar SET answer One='$ans1Val', answer Two='$ans2Val', answer Three='$ans3Val' WHERE member_id='$memberid' AND question_id='$questionid'; ..

UPDATE table_Foo Bar SET answer One='yes', answer Two='no', answer Three='yes' WHERE member_id = 1 AND question_id = 1; UPDATE table_Foo Bar SET answer One='no', answer Two='no', answer Three='yes' WHERE member_id = 1 AND question_id = 2; UPDATE table_Foo Bar SET answer One='yes', answer Two='yes', answer Three='no' WHERE member_id = 1 AND question_id = 3; oh, absolutely!!

A requirement arises in many systems to update multiple SQL database rows.Thing is, there have been no concerns about normalization as I have had no problems with data insertion, querying results, reporting the answers, association of answers with members, etc!The only thing I am trying to solve is updating the database with one query instead of (1 to N) number of insert queries depending on how many "items" are listed.greetings all i have My SQL database named library contains a table named books with the attributes:name,amount,price,cat_id and i want to update all the names,amount,prices for specific cat_idso i used the following query:the code doesn't work properly it takes the values in the last row in the jtable and set them for all attributes with cat_id=1 meaning if you have 3 rows in the jtable named table_science which have cat_id=1 and the columns: name,amount,price abc,5,300 efg,6,400 mno,6,900 and when i exceute the update query all the fields in the database which have cat_id=1 would be set to mno,6,900 meaning that the table_science would be: mno,6,900 mno,6,900 mno,6,900 is there's an error in the code? Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

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For small numbers of rows requiring updates, it can be adequate to use an UPDATE statement for each row that requires an update.

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