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How to find third or nth maximum salary from salary table?
How to find third or nth maximum salary from salary table(EmpID,EmpName,EmpSalary) in Optimized way?
54 Answers
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How do I add indices to MySQL tables?
I've got a very large MySQL table with about 150,000 rows of data. Currently, when I try and run
7 Answers
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Automatically create an Enum based on values in a database lookup table?
...and subsequently use its values in C# based on values in a database lookup table (using enterprise library data layer)?
14 ...
String replacement in batch file
...ABLEDELAYEDEXPANSION switch set.
setlocal ENABLEDELAYEDEXPANSION
set word=table
set str="jump over the chair"
set str=%str:chair=!word!%
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Display / print all rows of a tibble (tbl_df)
...ated by the dplyr data frame manipulation package in R. It prevents long table outputs when accidentally calling the data frame.
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How to count TRUE values in a logical vector
...values.
See for example:
z <- c(TRUE, FALSE, NA)
sum(z) # gives you NA
table(z)["TRUE"] # gives you 1
length(z[z == TRUE]) # f3lix answer, gives you 2 (because NA indexing returns values)
So I think the safest is to use na.rm = TRUE:
sum(z, na.rm = TRUE) # best way to count TRUE values
(whi...
Find rows that have the same value on a column in MySQL
In a [member] table, some rows have the same value for the email column.
8 Answers
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How do you change the datatype of a column in SQL Server?
... varchar(50) to a nvarchar(200) . What is the SQL command to alter this table?
8 Answers
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SQL update trigger only when column is modified
...oRepair <> I.QtyToRepair
END
END
2- Use Join between Inserted table and deleted table
ALTER TRIGGER [dbo].[tr_SCHEDULE_Modified]
ON [dbo].[SCHEDULE]
AFTER UPDATE
AS BEGIN
SET NOCOUNT ON;
UPDATE SCHEDULE
SET modified = GETDATE()
, ModifiedUser = SUSER_NAME...
When to use a View instead of a Table?
When should a View actually be used over an actual Table? What gains should I expect this to produce?
8 Answers
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