Database update command
0
if i execute this code:
INSERT INTO TABLE MEDICAMENTOS VALUES (47281, 'Ibuprofeno', 'Ben-U-Ron');
UPDATE TABLE MEDICAMENTOS
SET DESIGNACAO = 'Ibuprofeno Generis'
WHERE CODIGO=47281;
So supose that is in transaction A, and after I execute the command update, i execute a transaction B (without a commit in transaction A), the code of transation B is:
SELECT designation
FROM MEDICAMENTOS
WHERE CODE BETWEEN ( 10000 AND 90000 );
So i'll see "ben-u-ron" because command update does a commit in the past commands, right?
mysql database
edited Nov 25 '18 at 21:25
Barmar
425k36248349
asked Nov 25 '18 at 21:16
José MirandaJosé Miranda
235
add a comment |
0
if i execute this code:
INSERT INTO TABLE MEDICAMENTOS VALUES (47281, 'Ibuprofeno', 'Ben-U-Ron');
UPDATE TABLE MEDICAMENTOS
SET DESIGNACAO = 'Ibuprofeno Generis'
WHERE CODIGO=47281;
So supose that is in transaction A, and after I execute the command update, i execute a transaction B (without a commit in transaction A), the code of transation B is:
SELECT designation
FROM MEDICAMENTOS
WHERE CODE BETWEEN ( 10000 AND 90000 );
So i'll see "ben-u-ron" because command update does a commit in the past commands, right?
mysql database
edited Nov 25 '18 at 21:25
Barmar
425k36248349
asked Nov 25 '18 at 21:16
José MirandaJosé Miranda
235
BothINSERTandUPDATEare in transaction A, so you won't see the new row at all in transaction B.
– Barmar
Nov 25 '18 at 21:27
But update command do commit when i execute it? Like ddl commands (create, alter, drop)?
– José Miranda
Nov 25 '18 at 21:28
1
No,UPDATEdoesn't auto-commit. Only queries that modify the schema.
– Barmar
Nov 25 '18 at 21:39
Ahh, thank you, that was my question!
– José Miranda
Nov 25 '18 at 21:40
Possible duplicate of Database transactions - How do they work?
– Sam M
Nov 26 '18 at 1:52
add a comment |
0
0
0
if i execute this code:
INSERT INTO TABLE MEDICAMENTOS VALUES (47281, 'Ibuprofeno', 'Ben-U-Ron');
UPDATE TABLE MEDICAMENTOS
SET DESIGNACAO = 'Ibuprofeno Generis'
WHERE CODIGO=47281;
So supose that is in transaction A, and after I execute the command update, i execute a transaction B (without a commit in transaction A), the code of transation B is:
SELECT designation
FROM MEDICAMENTOS
WHERE CODE BETWEEN ( 10000 AND 90000 );
So i'll see "ben-u-ron" because command update does a commit in the past commands, right?
mysql database
edited Nov 25 '18 at 21:25
Barmar
425k36248349
asked Nov 25 '18 at 21:16
José MirandaJosé Miranda
235
if i execute this code:
INSERT INTO TABLE MEDICAMENTOS VALUES (47281, 'Ibuprofeno', 'Ben-U-Ron');
UPDATE TABLE MEDICAMENTOS
SET DESIGNACAO = 'Ibuprofeno Generis'
WHERE CODIGO=47281;
So supose that is in transaction A, and after I execute the command update, i execute a transaction B (without a commit in transaction A), the code of transation B is:
SELECT designation
FROM MEDICAMENTOS
WHERE CODE BETWEEN ( 10000 AND 90000 );
So i'll see "ben-u-ron" because command update does a commit in the past commands, right?
mysql database
mysql database
edited Nov 25 '18 at 21:25
Barmar
425k36248349
asked Nov 25 '18 at 21:16
José MirandaJosé Miranda
235
edited Nov 25 '18 at 21:25
Barmar
425k36248349
asked Nov 25 '18 at 21:16
José MirandaJosé Miranda
235
edited Nov 25 '18 at 21:25
Barmar
425k36248349
edited Nov 25 '18 at 21:25
Barmar
425k36248349
edited Nov 25 '18 at 21:25
Barmar
425k36248349
425k36248349
asked Nov 25 '18 at 21:16
José MirandaJosé Miranda
235
asked Nov 25 '18 at 21:16
José MirandaJosé Miranda
235
asked Nov 25 '18 at 21:16
José MirandaJosé Miranda
235
235
BothINSERTandUPDATEare in transaction A, so you won't see the new row at all in transaction B.
– Barmar
Nov 25 '18 at 21:27
But update command do commit when i execute it? Like ddl commands (create, alter, drop)?
– José Miranda
Nov 25 '18 at 21:28
1
No,UPDATEdoesn't auto-commit. Only queries that modify the schema.
– Barmar
Nov 25 '18 at 21:39
Ahh, thank you, that was my question!
– José Miranda
Nov 25 '18 at 21:40
Possible duplicate of Database transactions - How do they work?
– Sam M
Nov 26 '18 at 1:52
add a comment |
BothINSERTandUPDATEare in transaction A, so you won't see the new row at all in transaction B.
– Barmar
Nov 25 '18 at 21:27
But update command do commit when i execute it? Like ddl commands (create, alter, drop)?
– José Miranda
Nov 25 '18 at 21:28
1
No,UPDATEdoesn't auto-commit. Only queries that modify the schema.
– Barmar
Nov 25 '18 at 21:39
Ahh, thank you, that was my question!
– José Miranda
Nov 25 '18 at 21:40
Possible duplicate of Database transactions - How do they work?
– Sam M
Nov 26 '18 at 1:52
Both
INSERT and UPDATE are in transaction A, so you won't see the new row at all in transaction B.– Barmar
Nov 25 '18 at 21:27
Both
INSERT and UPDATE are in transaction A, so you won't see the new row at all in transaction B.– Barmar
Nov 25 '18 at 21:27
But update command do commit when i execute it? Like ddl commands (create, alter, drop)?
– José Miranda
Nov 25 '18 at 21:28
But update command do commit when i execute it? Like ddl commands (create, alter, drop)?
– José Miranda
Nov 25 '18 at 21:28
1
1
No,
UPDATE doesn't auto-commit. Only queries that modify the schema.– Barmar
Nov 25 '18 at 21:39
No,
UPDATE doesn't auto-commit. Only queries that modify the schema.– Barmar
Nov 25 '18 at 21:39
Ahh, thank you, that was my question!
– José Miranda
Nov 25 '18 at 21:40
Ahh, thank you, that was my question!
– José Miranda
Nov 25 '18 at 21:40
Possible duplicate of Database transactions - How do they work?
– Sam M
Nov 26 '18 at 1:52
Possible duplicate of Database transactions - How do they work?
– Sam M
Nov 26 '18 at 1:52
add a comment |
0
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Both
INSERTandUPDATEare in transaction A, so you won't see the new row at all in transaction B.– Barmar
Nov 25 '18 at 21:27
But update command do commit when i execute it? Like ddl commands (create, alter, drop)?
– José Miranda
Nov 25 '18 at 21:28
1
No,
UPDATEdoesn't auto-commit. Only queries that modify the schema.– Barmar
Nov 25 '18 at 21:39
Ahh, thank you, that was my question!
– José Miranda
Nov 25 '18 at 21:40
Possible duplicate of Database transactions - How do they work?
– Sam M
Nov 26 '18 at 1:52