select
top
1
*
from
demotab
where
(
‘
“&start_time&”
‘
<=
start_time
and
‘
“&end_time&”
‘
>=
end_time)
or
—
判断新日期段与原日期段是否存在外包含
(
‘
“&start_time&”
‘
>=
start_time
and
‘
“&end_time&”
‘
<=
end_time)
or
—
判断新日期段与原日期段是否存在内包含
(
‘
“&start_time&”
‘
<=
start_time
and
‘
“&end_time&”
‘
<=
end_time
and
‘
“&end_time&”
‘
>=
start_time)
or
—
判断新日期段与原日期段是否存在左交叉
(
‘
“&start_time&”
‘
>=
start_time
and
‘
“&start_time&”
‘
<=
end_time
and
‘
“&end_time&”
‘
>=
end_time)
—
判断新日期段与原日期段是否存在右交叉
top
1
*
from
demotab
where
(
‘
“&start_time&”
‘
<=
start_time
and
‘
“&end_time&”
‘
>=
end_time)
or
—
判断新日期段与原日期段是否存在外包含
(
‘
“&start_time&”
‘
>=
start_time
and
‘
“&end_time&”
‘
<=
end_time)
or
—
判断新日期段与原日期段是否存在内包含
(
‘
“&start_time&”
‘
<=
start_time
and
‘
“&end_time&”
‘
<=
end_time
and
‘
“&end_time&”
‘
>=
start_time)
or
—
判断新日期段与原日期段是否存在左交叉
(
‘
“&start_time&”
‘
>=
start_time
and
‘
“&start_time&”
‘
<=
end_time
and
‘
“&end_time&”
‘
>=
end_time)
—
判断新日期段与原日期段是否存在右交叉
前提是输入的end_time是大于start_time
如果SQL语句有返回记录则日期有冲突，否则则正确！
如果SQL语句有返回记录则日期有冲突，否则则正确！
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