Postgresql 中文操作指南
Synopsis
MOVE [ direction ] [ FROM | IN ] cursor_name
where direction can be one of:
NEXT
PRIOR
FIRST
LAST
ABSOLUTE count
RELATIVE count
count
ALL
FORWARD
FORWARD count
FORWARD ALL
BACKWARD
BACKWARD count
BACKWARD ALLDescription
MOVE 重新定位光标，而不检索任何数据。 MOVE 的工作原理与 FETCH 命令完全相同，除了它只定位光标，而不返回行。
MOVE repositions a cursor without retrieving any data. MOVE works exactly like the FETCH command, except it only positions the cursor and does not return rows.
MOVE 命令的参数与 FETCH 命令中的参数相同；有关语法和使用情况的详细信息，请参阅 FETCH 。
The parameters for the MOVE command are identical to those of the FETCH command; refer to FETCH for details on syntax and usage.
Outputs
如果成功完成， MOVE 命令将返回以下形式的命令标记：
On successful completion, a MOVE command returns a command tag of the form
MOVE countcount 是具有相同参数的 FETCH 命令将返回的行数（可能为零）。
The count is the number of rows that a FETCH command with the same parameters would have returned (possibly zero).
Examples
BEGIN WORK;
DECLARE liahona CURSOR FOR SELECT * FROM films;
-- Skip the first 5 rows:
MOVE FORWARD 5 IN liahona;
MOVE 5
-- Fetch the 6th row from the cursor liahona:
FETCH 1 FROM liahona;
code | title | did | date_prod | kind | len
-------+--------+-----+------------+--------+-------
P_303 | 48 Hrs | 103 | 1982-10-22 | Action | 01:37
(1 row)
-- Close the cursor liahona and end the transaction:
CLOSE liahona;
COMMIT WORK;