postgresql cursor

Cursor: Hand cursor: pointer have the same effect. They all look like the cursor pointing to a link, and the cursor turns into a hand line.Cursor: Hand: IE is fully supported. But it is not supported in Firefox and does not work.Cursor: pointer: is the standard of css2.0. So Firefox is supported, but ie5.0 is not suppo

Oracle Database cursor case and source code, oracle cursor 1. cursor ConceptCursor is a data buffer provided by the system for users to store the execution results of SQL statements. Each cursor area has a name. You can use SQL statements to obtain records from the cursor on

With cursors, and while you can traverse each record in your query and pass the required fields to the variable for handling accordingly ================== DECLARE @A1 VARCHAR (a), @A2 VARCHAR (a), @A3 INT DECLARE CURSOR youcurname for SELECT a1,a2,a3 Youtablename OPEN youcurname fetch NEXT from Youcurname to @a1, @a2, @a3 while @ @fetch_status ...... The action you want to perform is written here FETCH NEXT from Youcurname to

Windows API-cursor operation, Windows API-cursorObtain and set the cursor position on the screen GetCursorPos obtains the position of the cursor on the screen. The cursor position is always specified vertically in the screen coordinate and is not affected by the window ing mode that contains the

From mysqlV55, a major change was made, that is, InnoDB was used as the default storage engine. InnoDB supports transactions and has the relevant RDBMS features: ACID transaction support, data integrity (supports foreign keys), and disaster recovery capabilities. Now, a brief summary of the cursor changes from mysql V5.5, that is, InnoDB is used as the default storage engine. InnoDB supports transactions and has the relevant RDBMS features: ACID trans

$ SQLAREA and V $ SQL.V $ SQLAREA: retains the parent cursor information of an SQL statement. It can be identified by SQL _ID. The VERSION_COUNT column indicates the number of child game targets.V $ SQL : Retains the subcursor information of an SQL statement, which can be identified by SQL _ID and CHILD_NUMBER. V $ SQL _SHARED_CURSOR: the reason why a sub-game is generated by a statement. First, confirm the parameter cursor_sharing. The default valu

PHP array cursor provides detailed explanation of various operations on the array, and php array cursor details. PHP array cursor implements various operations on the array. php array cursor details This article analyzes the PHP array cursor to implement various operations o

Python has a cursor hole and python has a cursor hole. For convenience, this time we will not write the script separately. Just execute it step by step.The cursor is a pointer. For example, I have1234When each entry occupies one row, the initial cursor is at the position of 1 by default. When read (1) is passed, the

Adaptive cursor sharing has multiple execution plans for a single statement that contains bound variables, meaning that the execution plan adapts to the execution plan that best fits that value based on the specific value of the bound variable.Hide parameter _optimizer_adaptive_cursor_sharing=true turn this feature on or off.First: Whether the cursor can be used by ACS, first the

CSS cursor mouse pointer mouse cursor style tutorialWe are in the div CSS layout, we will encounter the object within the mouse pointer cursor control, such as the mouse pointer changes to the shape of the finger style, next we introduce the mouse pointer style cursor control. System default mouse pointer style outside

Declare Cursor Stus_cur Is Select* FromStudents; -- defines the cursor and assigns a value (is cannot be used separately from cursor) cur_stu students % Rowtype; -- Define rowtype Begin Open Stus_cur; -- Enable cursor Loop-- Loop Exit WhenStus_cur % Notfound; -- Cyclic Condition Fetch Stus_cur IntoCur_stu; -- the

Label:1. Cursors are useful when the data table has no ID (identity), but the cursor eats more memory, reduces available concurrency, consumes bandwidth, locks resources, and, of course, more code 2. If you can not use cursors, try to avoid using cursors, run out and then must be closed and released, try not to define the cursor on a large amount of data, try not to use the

Here to say is not the definition of specific cursors and the use of methods, but the database stored procedure return type is a cursor, VC use ADO technology how to obtain data in the cursor problem. What is the difference between Postgre and SQL Server. Beginning to think that using a Recordset object to open a recordset as a cursor, you can get the data in th

In 11g, Oracle introduced a new feature: adaptive cursor sharing. This feature is mainly used to improve the execution plan of SQL statements with variable binding. It also causes SQL statements with variable binding to generate multiple cursors. In 9i, Oracle introduced the bind peeking technology, which allows the optimizer to determine the selectivity of the where clause during the first hard parsing of SQL statements, this improves the quality of

CSS cursor mouse pointer mouse cursor style tutorial article (Body Sense Music)We are in the div CSS layout, we will encounter the object within the mouse pointer cursor control, such as the mouse pointer changes to the shape of the finger style, next we introduce the mouse pointer style cursor control. The system defa

Reference variable--Variable used to store the value pointer Cursor variable(Ref cursor) When using a cursor, you do not need to specify the corresponding SELECT statement when defining the cursor. When the cursor is open (when the cu