Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <pre><code>VB C# UBound() = yourArray.GetUpperBound(0) or yourArray.Length for one-dimesional arrays LBound() = yourArray.GetLowerBound(0) IsNothing() = Object.ReferenceEquals(obj,null) Chr() = Convert.ToChar() Len() = "string".Length UCase() = "string".ToUpper() LCase() = "string".ToLower() Left() = "string".Substring(0, length) Right() = "string".Substring("string".Length - desiredLength) RTrim() = "string".TrimEnd() LTrim() = "string".TrimStart() Trim() = "string".Trim() Mid() = "string".Substring(start, length) Replace() = "string".Replace() Split() = "string".Split() Join() = String.Join() MsgBox() = MessageBox.Show() IIF() = (boolean_condition ? "true" : "false") </code></pre> <p><strong>Notes</strong></p> <ul> <li><code>yourArray.GetUpperBound(0)</code> vs <code>yourArray.Length</code>: if the array is zero-length, GetUpperBound will return -1, while Length will return 0. <code>UBound()</code> in VB.NET will return -1 for zero-length arrays.</li> <li>The VB string functions uses a one based index, while the .NET method uses a zero based index. I.e. <code>Mid("asdf",2,2)</code> corresponds to <code>"asdf".SubString(1,2)</code>.</li> <li><code>?</code> is not the exact equivalent of <code>IIf</code> because <code>IIf</code> always evaluates <em>both</em> arguments, and <code>?</code> only evaluates the one it needs. This could matter if there are side effects of the evaluation ~ <em>shudder!</em></li> <li>The Many classic VB String functions, including <code>Len()</code>, <code>UCase()</code>, <code>LCase()</code>, <code>Right()</code>, <code>RTrim()</code>, and <code>Trim()</code>, will treat an argument of <code>Nothing</code> (<code>Null</code> in c#) as being equivalent to a zero-length string. Running string methods on <code>Nothing</code> will, of course, throw an exception.</li> <li>You can also pass <code>Nothing</code> to the classic VB <code>Mid()</code> and <code>Replace()</code> functions. Instead of throwing an exception, these will return <code>Nothing</code>.</li> </ul>
    singulars
    1. This table or related slice is empty.
    1. POVB to C# Functions
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USTim
    1. USGavin Miller
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POVB to C# Functions
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUndeletion
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COIt's CW so feel free to correct/modify/add
      singulars
      1. PO
      1. USGavin Miller
    2. COTake care though, & double check you haven't stomped on someone else's edits
      singulars
      1. PO
      1. USChrisF
    3. COI suspect you reversed UBound and LBound, but I don't know VB.
      singulars
      1. PO
      1. USJosh Lee
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload