Update set where like

Try 1 month free. Was this information helpful? Yes No. Thank you! Any more feedback? The more you tell us the more we can help. Can you help us improve? Resolved my issue. Clear instructions. MySQL must resolve the ambiguity, and cannot magically always guess the coder's intention, as you discovered. The problem is it tends to surprise people who only know MySQL, and you have to remember to override the default. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Asked 9 years, 4 months ago. Active 3 years ago. Viewed 61k times. Himanshu Jansari Address table. Examples in this section demonstrate ways that you can use to limit the number of rows affected by the UPDATE statement. The statement updates the value in the Color column of the Production.

Product table for all rows that have an existing value of 'Red' in the Color column and have a value in the Name column that starts with 'Road'. The following example updates the VacationHours column by 25 percent for 10 random rows in the Employee table.

The following example updates the vacation hours of the 10 employees with the earliest hire dates. The following example updates the PerAssemblyQty value for all parts and components that are used directly or indirectly to create the ProductAssemblyID The common table expression returns a hierarchical list of parts that are used directly to build ProductAssemblyID and parts that are used to build those components, and so on.

Only the rows returned by the common table expression are modified. Other tables participating in the cursor are not affected. The example doubles the value in the ListPrice column for all rows in the Product table.

The following example uses the variable NewPrice to increment the price of all red bicycles by taking the current price and adding 10 to it.

The following example uses a subquery in the SET clause to determine the value that is used to update the column. The subquery must return only a scalar value that is, a single value per row. The following example sets the CostRate column to its default value 0.

Examples in this section demonstrate how to update rows by specifying a view, table alias, or table variable. The following example updates rows in a table by specifying a view as the target object. The view definition references multiple tables, however, the UPDATE statement succeeds because it references columns from only one of the underlying tables. For more information, see Modify Data Through a View.

The follow example updates rows in the table Production. Examples in this section demonstrate methods of updating rows from one table based on information in another table.

The previous example assumes that only one sale is recorded for a specified salesperson on a specific date and that updates are current. If more than one sale for a specified salesperson can be recorded on the same day, the example shown does not work correctly. The example runs without error, but each SalesYTD value is updated with only one sale, regardless of how many sales actually occurred on that day.

In the situation in which more than one sale for a specified salesperson can occur on the same day, all the sales for each sales person must be aggregated together within the UPDATE statement, as shown in the following example:. Examples in this section demonstrate how to update rows in a remote target table by using a linked server or a rowset function to reference the remote table.

The following example updates a table on a remote server. The linked server name, MyLinkedServer , is then specified as part of the four-part object name in the form server. Note that you must specify a valid server name for datasrc. The linked server name created in the previous example is used in this example.

For more information, see ad hoc distributed queries Server Configuration Option. Examples in this section demonstrate methods of updating values in columns that are defined with large object LOB data types. The following example uses the. Document table. The word components is replaced with the word features by specifying the replacement word, the starting location offset of the word to be replaced in the existing data, and the number of characters to be replaced length. It automatically converts into a set and adds to the set.

Return value : This method adds set2 to set1 and returns nothing. Skip to content. Change Language. Related Articles. Table of Contents. Improve Article. Save Article.