📝 [Docs] SQL Data Types and Schemas (#4)

Poin-Book · Oct 17, 2023 · 3bb9a6e · 3bb9a6e
1 parent 4253e7f
commit 3bb9a6e
Show file tree

Hide file tree

Showing 2 changed files with 37 additions and 5 deletions.
diff --git a/Chapter 04 - Intermediate SQL/Item 01 - SQL Data Types and Schemas/Note.md b/Chapter 04 - Intermediate SQL/Item 01 - SQL Data Types and Schemas/Note.md
diff --git a/Chapter 04 - Intermediate SQL/Item 05 - SQL Data Types and Schemas/Note.md b/Chapter 04 - Intermediate SQL/Item 05 - SQL Data Types and Schemas/Note.md
@@ -0,0 +1,37 @@
+# SQL Data Types and Schemas
+
+> 작성자: 최선규
+
+## SQL Data Types
+
+date:
+
+- YYYY-MM-DD
+- ex. 2021-01-01
+
+time:
+
+- HH:MM:SS
+- ex. 12:30:00
+
+timestamp:
+
+- YYYY-MM-DD HH:MM:SS
+- ex. 2021-01-01 12:30:00
+
+interval:
+
+- 시간 간격을 표현
+- ex. 1 year 2 months 3 days 4 hours 5 minutes 6 seconds
+
+## Index creation
+
+```sql
+create table student ( 
+  ID varchar (5) primary key, 
+  name varchar (20) not null, 
+  dept_name varchar (20), 
+  tot_cred numeric (3,0) default 0);
+
+create index studentID_index on student(ID)
+```