sql-update

问题 In my table I have a column Segment_No which has duplicates. Now I want to update those duplicates. For example: the value 249X5601 is present in two rows. I want to change the second value to 249X5601R 回答1: The general form would be as follows: ;with AllRows as ( select Donation_ID,Registration_No,Segment_No, ROW_NUMBER() OVER ( PARTITION BY Segment_No order by <Suitable_Column> ) as rn from UnnamedTable ) update AllRows set Segment_no = <New_Value> where rn > 1 Where <Suitable_Column> gives

问题 <% Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/questionaire", "root", "root"); Statement st=con.createStatement(); ResultSet rs=st.executeQuery("Select * from question"); List arrlist = new ArrayList(); while(rs.next()){ String xa =rs.getString("display"); if(xa.equals("1")){ arrlist.add(rs.getString("q")); } } Collections.shuffle(arrlist); %> <%for(int i=0;i<5;i++){ String str = (String) arrlist.get(i);%> <%=str%> //1 <%st.executeUpdate("update question set

问题 <% Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/questionaire", "root", "root"); Statement st=con.createStatement(); ResultSet rs=st.executeQuery("Select * from question"); List arrlist = new ArrayList(); while(rs.next()){ String xa =rs.getString("display"); if(xa.equals("1")){ arrlist.add(rs.getString("q")); } } Collections.shuffle(arrlist); %> <%for(int i=0;i<5;i++){ String str = (String) arrlist.get(i);%> <%=str%> //1 <%st.executeUpdate("update question set

问题 Using BackgridJS (backgridjs.com) and want to be able to update one of the cells and save it to the server. This is the code that they provide us with for this task: var MyModel = Backbone.Model.extend({ initialize: function () { Backbone.Model.prototype.initialize.apply(this, arguments); this.on("change", function (model, options) { if (options && options.save === false) return; model.save(); }); } }); I added this to my code, and ran it on my server using MAMP. I looked at the JavaScript

问题 Using BackgridJS (backgridjs.com) and want to be able to update one of the cells and save it to the server. This is the code that they provide us with for this task: var MyModel = Backbone.Model.extend({ initialize: function () { Backbone.Model.prototype.initialize.apply(this, arguments); this.on("change", function (model, options) { if (options && options.save === false) return; model.save(); }); } }); I added this to my code, and ran it on my server using MAMP. I looked at the JavaScript

问题 Lock issue occurred when i tried to update a Column of a table with concatenate the same column value with some characters. UPDATE Templates SET TemplateName = CONCAT("'", (SELECT TemplateName FROM Templates WHERE LogID = 2), '_Validated',"'") WHERE LogID = 2; Is there any possible ways to achieve this? 回答1: Use: UPDATE TEMPLATES SET TemplateName = CONCAT("'", templatename, '_Validated') WHERE LogID = 2 来源： https://stackoverflow.com/questions/7857746/update-a-column-of-a-table-with-append

问题 Lock issue occurred when i tried to update a Column of a table with concatenate the same column value with some characters. UPDATE Templates SET TemplateName = CONCAT("'", (SELECT TemplateName FROM Templates WHERE LogID = 2), '_Validated',"'") WHERE LogID = 2; Is there any possible ways to achieve this? 回答1: Use: UPDATE TEMPLATES SET TemplateName = CONCAT("'", templatename, '_Validated') WHERE LogID = 2 来源： https://stackoverflow.com/questions/7857746/update-a-column-of-a-table-with-append

问题 I am currently trying to make an update page for user profiles on my site and. The code below works fine if the user updates all of their info, but if they leave out a field it inserts a blank record into the table. Currently to get past this problem if the user has left a field blank I replace the blank field with $_SESSION['user']['field'] so it just re-inserts current data. Here is my php at the moment <?php session_start(); if($_SESSION['uname']) { $logged_in=true; } else { $logged_in

问题 I currently have a subform that displays a select query. I want to update all the records of Table B that are showing in the subform with information from the form. The subform is not necessary. I was just using it to make sure my select query was displaying correctly. Table A has 3 columns (OID, Project_Number, Landowner) Table B has 4 columns (OID, PhoneNum, Address, Year) These tables have a one to many relationship. One OID in Table A relates to many in Table B Table A 1 A10 Bill 2 B10

问题 I'm keeping track of the unique combinations encountered of three different integer IDs using the solution described in Continuously insert all unique combinations encountered of three IDs. These IDs are a combination of product/group/region IDs etc. Now I want to bulk update another table by finding the unique IDs that correspond to those combinations. I'm trying to do that using the function update_with_combination_ids below, but it doesn't work because Postgres has limited support for