问在MySql中创建Insert语句的存储过程？
EN

Stack Overflow用户

提问于 2010-05-04 08:06:24

回答 4查看 3.7K关注 0票数 0

我需要一个value过程来获取一个表的记录，并将值作为Insert语句返回给所选记录。

例如，存储过程应该有三个输入参数...

1-表名

2-列名

3列值

如果

1-表名= "EMP“

2-列名= "EMPID“

3-列值= "15“

然后输出应该是，select所有EMP的值，其中EMPID为15。一旦为上述条件选择了这些值，存储过程必须返回用于插入所选值的脚本。

这样做的目的是备份选定的值。当SP返回值{Insert statements}时，c#只会将它们写入.sql文件。

我不知道如何写这个SP，任何代码的样本都会出现。谢谢..

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回答 4

Stack Overflow用户

回答已采纳

发布于 2010-05-18 09:38:30

DELIMITER $$

DROP PROCEDURE IF EXISTS `sample`.`InsGen` $$
CREATE DEFINER=`root`@`localhost` PROCEDURE `InsGen`(
in_db varchar(20),
in_table varchar(20),
in_ColumnName varchar(20),
in_ColumnValue varchar(20)
)
BEGIN

declare Whrs varchar(500);
declare Sels varchar(500);
declare Inserts varchar(200);
declare tablename varchar(20);
declare ColName varchar(20);


set tablename=in_table;


# Comma separated column names - used for Select
select group_concat(concat('concat(\'"\',','ifnull(',column_name,','''')',',\'"\')'))
INTO @Sels from information_schema.columns where table_schema=in_db and table_name=tablename;


# Comma separated column names - used for Group By
select group_concat('`',column_name,'`')
INTO @Whrs from information_schema.columns where table_schema=in_db and table_name=tablename;


#Main Select Statement for fetching comma separated table values

 set @Inserts=concat("select concat('insert IGNORE into ", in_db,".",tablename," values(',concat_ws(',',",@Sels,"),');')
 as MyColumn from ", in_db,".",tablename, " where ", in_ColumnName, " = " , in_ColumnValue, " group by ",@Whrs, ";");

 PREPARE Inserts FROM @Inserts;

EXECUTE Inserts;                    

END $$

DELIMITER ;

票数 0

Stack Overflow用户

发布于 2010-05-04 23:01:13

您可以使用mysqldump来完成此操作：

mysqldump --no-create-info --skip-triggers 
  --where="$COLUMN_NAME='$COLUMN_VALUE'" --databases $DB --tables $TABLE_NAME

票数 4

Stack Overflow用户

发布于 2012-12-25 08:28:20

为了扩展Anuya的答案(引用自http://kedar.nitty-witty.com/blog/mysql-stored-procedure-to-generate-extract-insert-statement)，顺便说一句…

首先需要一些助手mysql函数：

/*
isNumeric - return 1/true if passed in string is numeric, false otherwise
Usage example: select isNumeric('2012-02-16'); => 0
*/
DROP FUNCTION IF EXISTS `bettermentdb`.`isNumeric`;
DELIMITER ;;
CREATE DEFINER=`betterment-web`@`localhost` FUNCTION `bettermentdb`.`isNumeric`(s varchar(255))
RETURNS TINYINT
DETERMINISTIC
BEGIN
   SET @match ='^(([0-9+-.$]{1})|([+-]?[$]?[0-9]*(([.]{1}[0-9]*)|([.]?[0-9]+))))$';
   RETURN IF(s regexp @match, 1, 0);
END;;
DELIMITER ;

/*
isNumeric - return an input wrapped in "'" if value is non-numeric, original otherwise.
Depends on isNumeric()
Usage example: select wrapNonNumeric(now()); => '2012-02-16'
           select wrapNonNumeric(NULL); => NULL
           select wrapNonNumeric(1); => 1
*/
DROP FUNCTION IF EXISTS `bettermentdb`.`wrapNonNumeric`;
DELIMITER ;;
CREATE DEFINER=`betterment-web`@`localhost` FUNCTION `bettermentdb`.`wrapNonNumeric`(s varchar(255))
RETURNS varchar(255)
DETERMINISTIC
BEGIN
   RETURN IF(isNumeric(s), s, concat("'", s, "'"));
END;;
DELIMITER ;

带有列名称的控制台输出定义了用引号括起来的非数字值，同时限制了给定行输入db.table：

DELIMITER ;;
DROP PROCEDURE IF EXISTS GenerateInsertSQL;
CREATE DEFINER=`root`@`localhost` PROCEDURE GenerateInsertSQL(IN in_db varchar(20), IN in_table varchar(32), IN in_row BIGINT)
READS SQL DATA
BEGIN
   DECLARE nullableValues varchar(1000);
   DECLARE colNames varchar(1000);
   DECLARE insertStmnt varchar(2000);

   SELECT group_concat(concat('IFNULL(wrapNonNumeric(`',column_name,'`), "NULL")')) INTO @nullableValues from information_schema.columns where table_schema=in_db and table_name=in_table;
   SELECT group_concat(concat('`',column_name,'`')) INTO @colNames from information_schema.columns where table_schema=in_db and table_name=in_table;

   SET @insertStmnt=concat("select concat('INSERT INTO `", in_db, "`.`", in_table, "`(", @colNames, ") VALUES (', concat_ws(', ',",@nullableValues,"),');') from ", in_db, ".", in_table, " where id = ", in_row, " group by ", @colNames, ";");
   PREPARE insertStmnt FROM @insertStmnt;
   EXECUTE insertStmnt;
END
DELIMITER ;