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Conditionally alters the view only if it already exists. schema_name Is the name of the schema to which the view belongs. view_name Is the name of the view. View names must follow the rules for identifiers. Specifying the view owner name is optional. ...
The following examples use theCASEexpression in anORDER BYclause to conditionally determine the sort order of the rows based on a given column value. In the first example, the value in theSalariedFlagcolumn of theHumanResources.Employeetable is evaluated. Employees that have theSalariedFlagset to ...
WHERE Specifies the conditions that limit the rows that are updated. There are two forms of update based on which form of the WHERE clause is used: Searched updates specify a search condition to qualify the rows to delete. Positioned updates use the CURRENT OF clause to specify a cursor. Th...
Before the CREATE EVENT SESSION statement, you can conditionally execute a DROP EVENT SESSION statement, in case a session with the same name already exists. This deletes the existing session. Without this, attempting to create a session with the same name causes an error.SQL Copy ...
Conditionally drops the column or constraint only if it already exists. RESUMABLE = { ON | OFF} Applies to: SQL Server 2022 (16.x) and later. Specifies whether an ALTER TABLE ADD CONSTRAINT operation is resumable. Add table constraint operation is resumable when ON. Add table constraint ope...
Add new rows of data into a table or view (INSERT) by specifying a list of column values or using asubqueryto select and manipulate existing data. Change column values in existing rows of a table or view (UPDATE). Update or insert rows conditionally into a table orview(MERGE). ...
For example, you could use this to conditionally add columns to the WHERE or ORDER BY clauses: let getCustomers filters = select { for c in main.Customer do where (c.FirstName = "John") kata (fun query -> match filters.LastName with | Some lastName -> query.Where("c.LastName",...
trim (where, set) foreach if The most common thing to do in dynamic SQL is conditionally include a part of a where clause. For example: SELECT * FROM BLOG WHERE state = ‘ACTIVE’<iftest="title != null">AND title like #{title}</if> This statement would provide an optional text...
While this is less flexible, it might be more readable. Typically, you insert NULLs conditionally, as the next example shows: printf("Enter employee number or 0 if not available: ");scanf("%d", &emp_number);if (emp_number == 0)ind_empnum = -1;elseind_empnum = 0;EXEC SQL INSERT...