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Renaming column multiple ids in SELECT


Renaming column multiple ids in SELECT

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Renaming column multiple ids in SELECT
Tag : mysql , By : silvervino
Date : November 24 2020, 01:01 AM

will be helpful for those in need I have a table named users with a column id and another grade_id and a table nammed grades with an id and a name. , Use ALIAS name to column
Try this:
SELECT u.id AS userId, u.name AS userName, 
       g.id AS gradeId, g.name As grade
FROM users AS u
INNER JOIN grades AS g ON g.id = u.grade_id

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How do I do this SELECT statement that uses column renaming (or column alias) with LINQ?


Tag : linq , By : lamberms
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , How do I get 'anotherColumnName' in LINQ? , Use an anonymous type:
var query = (from name in _context.Table
            select new { anotherColumnName = name.ColumnName });

Renaming a column name in an SQL SELECT statement, using AS, fails when used inside of a sql:query tag; why? JSTL 1.2


Tag : sql , By : ack
Date : March 29 2020, 07:55 AM
wish helps you I have been bashing my head against a wall all morning trying to figure this one out. , Per @r0ast3d's suggestion:
"[29 Dec 2007 0:16] Mark Matthews

Renaming column names to blank in SELECT


Tag : sql-server-2008 , By : Andrew L.
Date : March 29 2020, 07:55 AM
it fixes the issue Add a single space as the alias name. Aliases defined as "" or [] are not allowed.
SELECT Column1 AS [ ]

Renaming a column created from a select statement (MySQL)


Tag : mysql , By : Ganesh
Date : March 29 2020, 07:55 AM
this one helps. Use backticks to quote identifiers that contain special characters. As stated in the manual:
ALTER TABLE foo CHANGE `DATE(FROM_UNIXTIME(email_sends.created_ts))` newname DATE;

Conditionally renaming multiple column names


Tag : python , By : Rob
Date : March 29 2020, 07:55 AM
wish helps you Convert columns to Series and create counter by GroupBy.cumcount what is used for rename columns with 1 to N values:
a = 'x1,stance,y1,x2,stance,y2,x3,stance,y3,x4,stance,y4,x5,stance,y5,x6,stance,y6'
df = pd.DataFrame(columns=a.split(','))

select_cols = df.columns.to_series()
count = select_cols.groupby(level=0).cumcount().add(1).astype(str)

df.columns = np.where(select_cols == 'stance', 'stance' + count, select_cols)
print (df)
Empty DataFrame
Columns: [x1, stance1, y1, x2, stance2, y2, x3, stance3, y3, 
          x4, stance4, y4, x5, stance5, y5, x6, stance6, y6]
Index: []
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