下面是一个使用存储过程执行多条语句的示例: DELIMITER//CREATEPROCEDUREexecute_multiple_statements()BEGINSELECT*FROMusers;SELECT*FROMorders;END//DELIMITER;CALLexecute_multiple_statements(); 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 上面的代码中,我们首先使用DELIMITER关键字指定存储过程的分隔符为//,...
I have written several Stored Procedures which have multiple SELECT statements in order to return multiple ResultSets to the calling script. SQL script of one such procedure is as below: DELIMITER`$$ CREATE PROCEDURE `GetLists` () BEGIN ...
Multiple select statements being locked with no update running Submitted:8 Feb 2006 21:35Modified:19 Mar 2006 15:18 Reporter:Bruce BristolEmail Updates: Status:No FeedbackImpact on me: None Category:MySQL ServerSeverity:S2 (Serious) Version:4.1.16OS:Linux (Linux db1.rev.internal 2.6.9-11.)...
[UNION [ALL|DISTINCT] SELECT ...]UNIONisused to combine the resultfrommultiple SELECT statements into a single result set.URL: https://dev.mysql.com/doc/refman/8.0/en/union.html union把2个select语句的查询结果联合起来: column的数量和顺序,所有的select声明必须一样。
设置multipleStatements属性为true 1varconnection=mysql.createConnection( { multipleStatements: true } );23connection.query('select column1; select column2; select column3;',function(err, result){4if(err){5throw err;6}else{7console.log(result[0]);//Column1asa result8console.log(result[1]);...
SELECTcan also be used to retrieve rows computed without reference to any table. For example: You are permitted to specifyDUALas a dummy table name in situations where no tables are referenced: DUALis purely for the convenience of people who require that allSELECTstatements should haveFROMand pos...
Multiple-result processing also is required if you executeCALLstatements for stored procedures. Results from a stored procedure have these characteristics: Statements within the procedure may produce result sets (for example, if it executesSELECTstatements). These result sets are returned in the order ...
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The SELECT statement is used to select data from a database.The data returned is stored in a result table, called the result-set.SELECT SyntaxSELECT column1, column2, ... FROM table_name; Here, column1, column2, ... are the field names of the table you want to select data from. ...
SELECT COUNT(Column_4) FROM tbl_1 WHERE Column_2 = @val INTO @val3; UPDATE tbl_2 SET Col_1 = @val, Col_2 = @val2; SET counter = counter + 1; END WHILE; Subject Written By Posted How do I execute multi-select statements and update table in stored procedure ...