mysql select column to variable
To use variables to represent columns (or tables), you need to use PREPARE/EXECUTE. Try something like this: SET @colindex1=(CONCAT(i, @indent); SET ... ,NO, you can't use column name as variable unless it's a dynamic query (or) you are making it in your application code. A dynamic query way would be like , This blog post, will cover examples of MySQL [cci lang="mysql" no_links="true"]SELECT INTO[/cci] syntax for storing column values in variables ...,The number of variables must be the same as the number of columns or expressions in the select list. In addition, the query must returns zero or one row. If the query return no rows, MySQL issues a warning of no data and the value of the variables remain , The simplest solution is to use two separate queries. We use the result from the first query to dynamically generate the SQL text for the second ..., Like this : DECLARE myvar nvarchar(50); SELECT ATextColumn INTO myvar FROM myTable LIMIT 1,1; SELECT CONCAT('myvar is ',myvar ,' ., Take a look at the following: https://dev.mysql.com/doc/refman/5.7/en/sql-syntax-prepared-statements.html set @tblname1=(SELECT ...,In a MYSQL Stored-Procedure I need to select both the table columns, and select ... to declare*/ SELECT @pUSR_ID:=USR_ID, USR_Login, USR_Password, ... , SELECT myvalue INTO @myvar FROM mytable WHERE anothervalue = 1;. However, if you put .... You don't need to DECLARE a variable in MySQL. A variable's type is ... use SELECT ... INTO to assign columns to a variable:.,Selection from MySQL Cookbook, 2nd Edition [Book] ... The preceding SELECT statement assigns a column value to a variable, but variables also can be ...
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 mysql select column to variable 相關參考資料
How to use a variable as a column name for a SELECT statement ...
To use variables to represent columns (or tables), you need to use PREPARE/EXECUTE. Try something like this: SET @colindex1=(CONCAT(i, @indent); SET ... https://stackoverflow.com MySQL select column name from variable - Stack Overflow
NO, you can't use column name as variable unless it's a dynamic query (or) you are making it in your application code. A dynamic query way would be like https://stackoverflow.com MySQL SELECT INTO Syntax Part 1 – Uses With Variables ...
This blog post, will cover examples of MySQL [cci lang="mysql" no_links="true"]SELECT INTO[/cci] syntax for storing column values in variables ... https://joshuaotwell.com MySQL SELECT INTO Variable - MySQL Tutorial
The number of variables must be the same as the number of columns or expressions in the select list. In addition, the query must returns zero or one row. If the query return no rows, MySQL issues a wa... http://www.mysqltutorial.org MySQL select query with variable column name - Stack Overflow
The simplest solution is to use two separate queries. We use the result from the first query to dynamically generate the SQL text for the second ... https://stackoverflow.com MySQL SELECT, store in a variable - Stack Overflow
Like this : DECLARE myvar nvarchar(50); SELECT ATextColumn INTO myvar FROM myTable LIMIT 1,1; SELECT CONCAT('myvar is ',myvar ,' . https://stackoverflow.com Pass Column value as a variable in MySQL - Stack Overflow
Take a look at the following: https://dev.mysql.com/doc/refman/5.7/en/sql-syntax-prepared-statements.html set @tblname1=(SELECT ... https://stackoverflow.com Select columns into variables, along with other columns - Stack ...
In a MYSQL Stored-Procedure I need to select both the table columns, and select ... to declare*/ SELECT @pUSR_ID:=USR_ID, USR_Login, USR_Password, ... https://stackoverflow.com SELECT INTO Variable in MySQL DECLARE causes syntax error? - Stack ...
SELECT myvalue INTO @myvar FROM mytable WHERE anothervalue = 1;. However, if you put .... You don't need to DECLARE a variable in MySQL. A variable's type is ... use SELECT ... INTO to assign... https://stackoverflow.com Using User-Defined Variables in SQL Statements - MySQL ...
Selection from MySQL Cookbook, 2nd Edition [Book] ... The preceding SELECT statement assigns a column value to a variable, but variables also can be ... https://www.oreilly.com |