select

问题 How can I determine the value of the selected dropdown options using javascript. I can't use id selector so I was trying with document.getElementsByClassName. I understand that returns a set of values. Here is a simplified code I am trying to use: <div id="MDL" class="dates"> <p>Select Dates and Price</p> <select class="datevalue"> <option value="30">17th July - £30</option> <option value="45">17th July - £45</option> <option value="70">17th July - £70</option> <option value="30">18th July -

问题 I'm trying to write a MySQL SELECT statement in PHP. I have 2 tables, sales and sale_items . sales has columns: sale_id , status sale_items has columns: sale_id , date_added (DATETIME), quantity I need to return the quantities from sale_items , over the last 12 months grouped by month and where the status of the corresponding row in sales is equal to 'completed' (as you can see, sales and sale_items can be joined by sale_id ). I have tried modifying both of the following to suit my needs, but

问题 I'm using Angular4 tyring to associate ngValue to ngModel but getting Null . So kindly help me to connect ngValue to ngModel <select name="gender" [(ngModel)]="nameForm.gender"> <option [ngValue]="Male">Male</option> <option [ngValue]="Female">Female</option> <option [ngValue]="Others">Others</option> </select> 回答1: wrap around single quates 'Male' <select name="gender" [(ngModel)]="nameForm.gender"> <option [ngValue]="'Male'">Male</option> <option [ngValue]="'Female'">Female</option> <option

问题 I am trying to get the name of the files that are selected by a "file" input in HTML: <input type="file" class="filestyle" name="file-select[]" id="file-select" accept="image/*" multiple> I wrote this JavaScript code to do that: $('#file-select').on("change", function(){ var selectedFiless = this.files; for (var i = 0; i < selectedFiless.length; ++i) { var name = selectedFiless.item(i).name; alert(name); } }); However, I noticed that the names are sorted in alphabetical order, not in

问题 I am trying to get the name of the files that are selected by a "file" input in HTML: <input type="file" class="filestyle" name="file-select[]" id="file-select" accept="image/*" multiple> I wrote this JavaScript code to do that: $('#file-select').on("change", function(){ var selectedFiless = this.files; for (var i = 0; i < selectedFiless.length; ++i) { var name = selectedFiless.item(i).name; alert(name); } }); However, I noticed that the names are sorted in alphabetical order, not in

问题 am trying to perform a case sensitive serach of all columns in a table, so i did somthing like this Select * From mytable Where col1 || '--' || col2 || '--' || etc like '%SomeValue%' but it alwas return the same result for both upper case and lower case. if i do this Select * From mytable Where col1 like '%SomeValue%' OR col1 like '%SomeValue%' etc i get the desired result. The problems here is that i cannot use this second query as i have about 36 columns to search, and writing col1 like '

问题 am trying to perform a case sensitive serach of all columns in a table, so i did somthing like this Select * From mytable Where col1 || '--' || col2 || '--' || etc like '%SomeValue%' but it alwas return the same result for both upper case and lower case. if i do this Select * From mytable Where col1 like '%SomeValue%' OR col1 like '%SomeValue%' etc i get the desired result. The problems here is that i cannot use this second query as i have about 36 columns to search, and writing col1 like '

问题 I would appreciate any help creating this query. I have tried several methods without luck. As my question is somewhat difficult for me to phrase, I will make a simple example of what I want to do. I have data that is structurally similar to the following: ID TYPE COLOR 1 A Blue 1 B Red 1 C Green 2 C Blue 2 B Green I want to create a query to return the types if I have an ID with two specific colors. For example I would like to find all the ID that have both Blue and Red. The query would then

问题 I have a problem in Oracle SQL that I'm trying to get my head around. I'll illustrate with an example. I have three tables that I am querying: Employees __________________________________________ | EmployeeID | Name | | 1 | John Smith | | 2 | Douglas Hoppalot | | 3 | Harry Holiday | ... InternalCosts ________________________________ | IntID | Amount | EmployeeID | | 1 | 10 | 1 | | 2 | 20 | 2 | | 3 | 30 | 1 | ... ExternalCosts ________________________________ | ExtID | Amount | EmployeeID | |

问题 I have a problem in Oracle SQL that I'm trying to get my head around. I'll illustrate with an example. I have three tables that I am querying: Employees __________________________________________ | EmployeeID | Name | | 1 | John Smith | | 2 | Douglas Hoppalot | | 3 | Harry Holiday | ... InternalCosts ________________________________ | IntID | Amount | EmployeeID | | 1 | 10 | 1 | | 2 | 20 | 2 | | 3 | 30 | 1 | ... ExternalCosts ________________________________ | ExtID | Amount | EmployeeID | |