Sql updating a row
Because of this indeterminacy, referencing other tables only within sub-selects is safer, though often harder to read and slower than using a join.Attempt to insert a new stock item along with the quantity of stock.If the object being updated appears more than one time in the FROM clause, one, and only one, reference to the object must not specify a table alias.All other references to the object in the FROM clause must include an object alias. Table1 (c1 int PRIMARY KEY NOT NULL, c2 int NOT NULL); GO CREATE TABLE dbo. Table2 WHERE CURRENT OF abc; GO SELECT c1, c2 FROM dbo.For more information about predicates and search conditions, see Search Condition (Transact-SQL). For more information, see SET ANSI_PADDING (Transact-SQL).CURRENT OF Specifies that the update is performed at the current position of the specified cursor. Modifying a text, ntext, or image column with UPDATE initializes the column, assigns a valid text pointer to it, and allocates at least one data page, unless the column is being updated with NULL.
This can also be used to change the column to NULL if the column has no default and is defined to allow null values.
If the item already exists, instead update the stock count of the existing item.