SQL Server: Return all rows of a table which date field satisfies some date conditions -


i have table lot of employees, let's 'employees' table. table have date column among others. let's column called, 'injurydate'.

i select employees satisfy below conditions:

  1. injurydate within current month, example, if current month july, want employees that: injurydate >= 01/07/2017 , injurydate <= 31/07/2017.
  2. injurydate between day 20 of past month , first day of current month. example, if current month july, want employees that: injurydate >= 20/06/2017 , injurydate < 01/07/2017.

so taken account said here (taken account sql server can use index on column, if appropriate), have done below query:

declare @today datetime = getdate()  declare @day int  = 20 declare @month int  = month(dateadd(month, -1, @today)) declare @year int = year(dateadd(month, -1, @today)) declare @earlydate datetime = cast(cast(@year*10000 + @month*100 + @day varchar(255)) date)  select *   employees  (          -- condition 1          injurydate >= cast(@today - day(@today) + 1 date)              ,          injurydate < dateadd(month, 1, cast(@today - day(@today) + 1 date) )        )          or        (              -- condition 2          injurydate >= @earlydate             ,           injurydate < cast(@today - day(@today) + 1 date)         )

is correct, or there other better way it?

i using sql server 2008.

try this:

declare @today date = getdate();  declare @todayday int  = datepart(day, @today); declare @earlydate date = dateadd(day, 19, dateadd(month, datediff(month, 0, @today) - 1, 0)); declare @nextmonthfirstdaydate date = dateadd(month, datediff(month, 0, @today) + 1, 0);  select * (         values  (1, '2017-06-19'),                 (2, '2017-06-20'),                 (3, '2017-07-19'),                 (4, '2017-07-31'),                 (5, '2017-08-01')      ) employees(id,injurydate)  injurydate >= @earlydate , injurydate < @nextmonthfirstdaydate;

output:

id          injurydate ----------- ---------- 2           2017-06-20 3           2017-07-19 4           2017-07-31

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