Question

我需要一个storedprocedure来获取Table的记录并将值作为Insert Statements返回选定的记录。

对于Instance，存储过程应该有三个输入参数......

1-表名

2-列名称

3-列值

如果

1-表名=“EMP”

2-列名=“EMPID”

3-列值=“15”

然后输出应该是，选择EMPID为15的EMP的所有值为上述条件选择值后，存储过程必须返回插入所选值的脚本。

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

我不知道编写此SP，任何代码示例都是适用的。感谢..

Answer 1

您可以使用mysqldump执行此操作：

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

Answer 2

扩展Anuya的答案（引自http://kedar.nitty-witty.com/blog/mysql-stored-procedure-to-generate-extract-insert-statement）btw ......

首先需要一些帮助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col名称的控制台的输出定义和用引号括起来的非数字值，同时限制输入db.table的给定行：

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 ;

Answer 3

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 ;

Answer 4

今天不得不处理这个问题。

mysqldump没有问题，但不太友好，无法更改WHERE子句。

我结束了SQLyog，一个MySQL客户端，它有一个功能，你可以将任何sql SELECT语句的结果集导出到一堆INSERT语句中。

存储过程在MySql中创建Insert语句？

4 个答案: