MySQL ?? ?????? ?? ?? ?? ? ?? ??
MySQL?? ?? ????? ???? ??? ??? ????? ??? ? ????. ???? ???? ? ??? ?? ????? ???? ??? ???? ???? ??? ??? ???? ????.
?? ???? ?? ??? ?? ?? ????? ??? ? ????. ?? ?? ????? ??? ?????.
CREATE PROCEDURE 'searchInvoice'
(
OUT numOfRecords INT
)
BEGIN
DECLARE query1 TEXT;
DECLARE query2 TEXT;
SET query1 = 'SELECT COUNT(*) bla bla bla.....';
// Query1 to select the count of matching tuples..
SET query2 = 'SELECT * from bla bla bla....';
// Query2 to select original records...
// later part of this both queries generate dynamically according to some IN parameters..
// now I wanna assign the output of the query1 into numOfRecords
// and I wanna execute the query2 as well.. like this
SET @Sql = query2;
PREPARE STMT FROM @Sql;
EXECUTE STMT;
DEALLOCATE PREPARE STMT;
// output of the query2 can be read in PHP
END
query1? ??? numOfRecords ?? ??? ????? ?? ?? ??? ??? ? ????.
CREATE TABLE table1(
column1 VARCHAR(255) DEFAULT NULL,
column2 VARCHAR(255) DEFAULT NULL,
column3 VARCHAR(255) DEFAULT NULL
);
INSERT INTO table1 VALUES
('1', 'value1', 'value2'),
('2', 'value3', 'value4');
DELIMITER $$
CREATE PROCEDURE procedure1(IN Param1 VARCHAR(255), OUT Param2 VARCHAR(255), OUT Param3 VARCHAR(255))
BEGIN
SET @c2 = '';
SET @c3 = '';
SET @query = 'SELECT column2, column3 INTO @c2, @c3 FROM table1 WHERE column1 = ?';
PREPARE stmt FROM @query;
SET @c1 = Param1;
EXECUTE stmt USING @c1;
DEALLOCATE PREPARE stmt;
SET Param2 = @c2;
SET Param3 = @c3;
END$$
DELIMITER ;
-- Call procedure and use variables
SET @Param1 = 2;
SET @Param2 = '';
SET @Param3 = '';
CALL procedure1(@Param1, @Param2, @Param3);
SELECT @Param2, @Param3;
? ????
- SET @c2 = '' ? SET @c3 = '' ?? ??? ??????. ????.
- SET @query = 'SELECT ...' ?? ??? ???? ?????.
- SET @c1 = Param1 ?? ?? ????? ??? ?????.
- EXECUTE stmt USING @c1 ?? ??? ??? ?????.
- DEALLOCATE PREPARE stmt ?? ??? ? ???? ?????.
- SET Param2 = @c2 ? SET Param3 = @c3 ?? ?? ?? ????? ?????.
- ????? SELECT @Param2, @Param3 ???? ?? ?? ?????.
? ??? ???? ???? ??? ??? ? ????. MySQL ?? ???? ?? ??? ?? ???? ??? ?????.
? ??? MySQL ?? ???? ?? ?? ???? ??? ???? ??? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!
? AI ??
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??? ???? ??
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???? ?? ??? ??? ?? AI ?? ?
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???? ?? ???? ??? AI ?????.
Clothoff.io
AI ? ???
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??? ??? AI ?? ?? ??? ???? ?? ???? ??? ?? ????!
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???? ?? ?? ?? ???
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??? ??, ???? ?? ????.
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??? ? ?? ??
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? ??? ?? ?? ?????(SublimeText3)
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???? MySQL ?? ??? ????? ??? ??????
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