From 74ba96eb98e76e67eb40dee285312e1fae0428da Mon Sep 17 00:00:00 2001
From: Aysat <aysat.bakytbek@gmail.com>
Date: Wed, 26 Nov 2025 14:53:10 +0600
Subject: [PATCH] =?UTF-8?q?2=20=D0=B7=D0=B0=D0=B4=D0=B0=D1=87=D0=BA=D0=B0?=
 =?UTF-8?q?=20=D0=BF=D0=BE=20=D0=A1=D0=9A=D0=9B.=20=D0=92=D1=80=D0=BE?=
 =?UTF-8?q?=D0=B4=D0=B5=20=D0=BD=D0=BE=D1=80=D0=BC?=
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---
 aysat/lifecoding/SQL2.sql | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 aysat/lifecoding/SQL2.sql

diff --git a/aysat/lifecoding/SQL2.sql b/aysat/lifecoding/SQL2.sql
new file mode 100644
index 0000000..96c4aeb
--- /dev/null
+++ b/aysat/lifecoding/SQL2.sql
@@ -0,0 +1,23 @@
+with base as (
+select
+employee_id,
+to_dt,
+from_dt,
+lag(to_dt) over (partition by employee_id order by from_dt) lag_to_dt
+from abakhytbekuly.salary
+),
+error as (
+select 
+employee_id,
+from_dt,
+case when
+     lag_to_dt > from_dt then 'пересечение'
+     when 
+     lag_to_dt < from_dt then 'дыра'
+     end as status
+from base
+where lag_to_dt is not null  
+)
+select *
+from error
+order by employee_id, from_dt
\ No newline at end of file