Add blog on Oracle database commands

docs/blog/2020-08-28-oracle-programming/index.md

@@ -172,7 +172,7 @@ FROM dba_tables;
 
 You will get the following error message if you don't have access to the `dba_tables` view:
 
-```
+```bash
 ORA-00942: table or view does not exist
 ```
 
@@ -181,14 +181,14 @@ view, or `SELECT ANY DICTIONARY` privilege, or `SELECT_CATALOG_ROLE` privilege.
 
 #### [Comparing Dates](https://stackoverflow.com/a/34061999)
 
-```
+```sql
 Select count(*) From Employee
 Where to_char(employee_date_hired, 'YYYMMMDDD') > 19940620
 ```
 
 or
 
-```
+```sql
 Select count(*) From Employee
 employee_date_hired > TO_DATE('20-06-1994', 'DD-MM-YYYY');
 ```
@@ -197,15 +197,15 @@ employee_date_hired > TO_DATE('20-06-1994', 'DD-MM-YYYY');
 
 The 'l' command will show the last run command
 
-```
+```sql
 SQL> l
     1* select owner, count(1) from dba_tables group by owner
 SQL>
 ```
 
 To get more than that, turn on history
 
-```
+```sql
 SQL> set history on
 SQL> history
   1  select * from dual;
@@ -215,7 +215,7 @@ SQL> history
 
 #### [Get A List of All Tables](https://stackoverflow.com/a/205746)
 
-```
+```sql
 SELECT OWNER, TABLE_NAME
 FROM DBA_TABLES;
 ```
@@ -229,7 +229,7 @@ of Oracle tables that you probably don't care about.
 Alternatively, if you do not have access to `DBA_TABLES`, you can see all the tables that your account has access to
 through the `ALL_TABLES` view:
 
-```
+```sql
 SELECT OWNER, TABLE_NAME
 FROM ALL_TABLES;
 ```
@@ -239,7 +239,7 @@ the tables that your user has been granted access to).
 
 If you are only concerned with the tables that you own, not those that you have access to, you could use `USER_TABLES`:
 
-```
+```sql
 SELECT TABLE_NAME
 FROM USER_TABLES;
 ```