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21 Apr

When a getter method is called with a string and more than one column has the same alias or name as the string, the value of the first matching column is returned.The option to use a string as opposed to an integer is designed to be used when column aliases and names are used in the SQL query that generated the result set.It might help to think of a cursor maintaining path information with the root atom(or parent cursor) as a piece of string that runs from the cursor to the root atom(or parent cursor) and not think of it as a URI.Cursors behave differently during the render phase (anything that happens directly because of React is considered the render phase - everything outside, event handlers, core.async loops, etc. During the render phase, you treat a cursor as a value, as a regular map or vector.In cases where the value is treated as a string anyway, there is no drawback.Furthermore, if you want an application to retrieve values of any standard SQL type other than SQL3 types, use the are the name of the coffee and its price, respectively.The database cursor characteristic of traversal makes cursors akin to the programming language concept of iterator.Cursors are used by database programmers to process individual rows returned by database system queries.

By using the same mechanics, a SQL procedure can also define a result set and return it directly to the caller of the SQL procedure or to a client application.If the cursor points to a record that has just been deleted, a new record is created.Be aware that you can't call he cursor does not require us to select the data based on a key; we can just grab all of it.DECLARE 2 CURSOR my Cursor IS 3 SELECT * FROM sec_product FOR UPDATE OF product_description; 4 v_product_description VARCHAR2(20); 5 BEGIN 6 FOR idx IN my Cursor LOOP 7 v_product_description :=UPPER(idx.product_description); 8 UPDATE sec_product 9 SET product_description =v_product_description 10 WHERE CURRENT OF my Cursor; 11 END LOOP; 12 COMMIT; 13 END; 14 / PL/SQL procedure successfully completed. Components, however, generally do not care about the entire scope of the application state, but focus on specific parts of it.