StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

PO
primarykey
Id
4923248
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2011-02-07T15:44:31.830
FavoriteCount
0
LastActivityDate
2011-02-07T15:44:31.830
LastEditDate
LastEditorUserId
0
OwnerUserId
134554
ParentId
4920631
PostTypeId
2
Score
8
ViewCount
0
LastEditorDisplayName
text
Body
The question is a bit broad, but... A struct is an aggregate or composite data type, used for representing entities that are described by multiple attributes of potentially different types. Some examples: <ul> <li>A point in 3-D space, represented by 3 real-valued coordinates x, y, and z;</li> <li>A mailing address, represented by a street name, house or apartment number, city, state, ZIP code;</li> <li>A line item in an invoice, represented by a part name or number, unit cost, quantity, and subtotal;</li> <li>A node in a tree, represented by a key, data value, left child, and right child;</li> </ul> etc., etc., etc. Let's look at the mailing address as a concrete example. We could define our mailing address type as follows: <pre><code>struct Address { char *streetName; int buildingNumber; // House, apt building, office building, etc. char *aptNumber; // Handles apt and suite #s like K103, B-2, etc. char *city; char state[3]; int zip; }; </code></pre> We'd create an instance of that struct like so: <pre><code>struct Address newAddress; </code></pre> and a pointer to that instance as: <pre><code>struct Address *addrPtr = &newAddress; </code></pre> and access each of its fields using either the <code>.</code> or <code>-></code> operator depending on whether we're dealing with a struct instance or a pointer to a struct: <pre><code>newAddress.streetName = strdup("Elm"); addrPtr->buildingNumber = 100; ... </code></pre> Another way to look at structs is something like a database record composed of multiple fields. 
Tags
Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. POA clear, simple explanation of what a struct is in C
 singulars
 PostTypePostTypeId
 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. This table or related slice is empty.
UserOwnerUserId
1. USJohn Bode
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. POA clear, simple explanation of what a struct is in C
 singulars
 PostTypePostTypeId
 PTQuestion
PostsParentIdCreationDate
1. This table or related slice is empty.
VotesPostIdCreationDate
1. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTAcceptedByOriginator
2. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
3. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
CommentsPostId
1. This table or related slice is empty.

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.