JSON functions, first introduced in SQL Server 2016 (13.x), enable you to combine NoSQL and relational concepts in the same database. You can combine classic relational columns with columns that contain documents formatted as JSON text in the same table, parse and import JSON documents in rel...
all changes made by that session since the BEGIN TRANSACTION statement was issued are reverted (rolled back) and the transaction is aborted. A transaction rollback could also be forced by an external event, such as the database running out of disk space or a server crash, as I will explain...
The other two are the properties PartitionKey and RowKey, which we discussed previously. A third property required of all entities is Timestamp, which is used internally by the system to facilitate optimistic concurrency. The Timestamp column differs from the PartitionKey and R...
All the columns are treated as logical pages rendered on the same physical page. They are arranged from left to right, top to bottom, and are separated by white space between each column. If the report is divided into more than one column, each physical page is divided ...
To see an example of the negotiation chain, run the script FindSource.sql. The first part of the script creates a "documents" table and loads it with sample data. These are the underlying rules of the scenario: If docTypeID of the first (left–most) document in docPath is 1, the doc...
Change data capture can be set up to simply track all changes to a table or to track a subset of the columns in a table. Using a subset can be useful if some of the unimportant columns are very wide varchar columns or Binary Large Object (BLOB) columns (such as text, image, or XML...
C# Linq Group By on multiple columns C# LINQ List<KeyValuePair<string, KeyValuePair<int, int>>> Group by to List<KeyValuePair<string, List<KeyValuePair<int, int>>> C# LINQ one condition, return multiple columns and rows C# LINQ order by not working for a SQL table with a primary ke...
SQL object inheritance is based on a family tree of object types that forms a type hierarchy. The type hierarchy consists of a parent object type, called a supertype, and one or more levels of child object types, called subtypes, which are derived from the parent. Topics: About Inheritance...
If you want the optimizer to consider SPATIAL indexes on spatial columns that are not SRID-restricted, each such column should be modified: Verify that all values within the column have the same SRID. To determine the SRIDs contained in a geometry column col_name, use the following query: ...
As you can see, we need to define the data type as we create the columns of our table. Unlike most RDBMS that have dozens of data types, SQLite has only 5 data types: Null: A missing value Integer: Numbers without decimal points (e.g., 1, 2, 3, 4) ...