readme

README.md

@@ -27,26 +27,114 @@ php artisan migrate:fresh --seed
 
 # Result
 
-| Transactions | Method            |   time seconds |
-|-------------:|-------------------|---------------:|
-|         1000 | UpdateMassive1Job |          1,00s |
-|         1000 | UpdateMassive2Job |          0,01s |
-|         1000 | UpdateMassive3Job |          1,00s |
-|         1000 | UpdateMassive4Job |          0,08s |
-|         1000 | UpdateMassive5Job |          0,06s |
-|        10000 | UpdateMassive1Job |         14,00s |
-|        10000 | UpdateMassive2Job |          0,14s |
-|        10000 | UpdateMassive3Job |         14,00s |
-|        10000 | UpdateMassive4Job |          0,73s |
-|        10000 | UpdateMassive5Job |          0,59s |
-|       100000 | UpdateMassive1Job |   (2m) 156,00s |              
-|       100000 | UpdateMassive2Job |          1,00s |      
-|       100000 | UpdateMassive3Job |   (2m) 164,00s |          
-|       100000 | UpdateMassive4Job |          8,00s |      
-|       100000 | UpdateMassive5Job |          7,00s |      
-|      1000000 | UpdateMassive1Job | (26m) 1570,00s |              
-|      1000000 | UpdateMassive2Job |         15,00s |          
-|      1000000 | UpdateMassive3Job | (27m) 1630,00s |              
-|      1000000 | UpdateMassive4Job |    (1m) 75,00s |              
-|      1000000 | UpdateMassive5Job |         58,00s |          
+### Grupo 1:
 
+Atualizar um campo ou mais, mas o valor é o `mesmo` para um determinado grupo:
+
+`Update1Job`
+
+```sql
+update transactions
+set date=now(),
+    value=1
+where id = 1;
+
+update transactions
+set date=now(),
+    value=1
+where id = 2;
+
+update transactions
+set date=now(),
+    value=1
+where id = 3;
+...
+``` 
+
+`Update2Job`
+
+```sql
+update transactions
+set date=now(),
+    value=1
+where id in (1, 2, 3, . . .);
+```
+
+|  quantity | method            |       time seconds |
+|----------:|-------------------|-------------------:|
+|     1.000 | UpdateMassive1Job |              1,00s |
+|     1.000 | UpdateMassive2Job |              0,01s |
+|    10.000 | UpdateMassive1Job |             14,00s |
+|    10.000 | UpdateMassive2Job |              0,14s |
+|   100.000 | UpdateMassive1Job |   (2m 36s) 156,00s |              
+|   100.000 | UpdateMassive2Job |              1,00s |
+| 1.000.000 | UpdateMassive1Job | (26m 10s) 1570,00s |              
+| 1.000.000 | UpdateMassive2Job |             15,00s |
+
+### Grupo 2:
+
+Atualizar um campo ou mais, mas o valor é o `diferente` para um determinado grupo:
+
+`Update3Job`
+
+```sql
+update transactions
+set date='2023-04-01',
+    value=10
+where id = 1;
+
+update transactions
+set date='2023-04-02',
+    value=20
+where id = 2;
+
+update transactions
+set date='2023-04-03',
+    value=30
+where id = 3;
+...
+``` 
+
+`Update4Job`
+
+```sql
+update transactions
+set date= case id when 1 then '2023-04-01'::date
+     when 2 then '2023-04-02'::date 
+     when 3 then '2023-04-03'::date
+end
+,
+    value=case id when 1 then 10
+     when 2 then 20 
+     when 3 then 30
+end
+where id in (1, 2, 3);
+```
+
+`Update5Job`
+
+```sql
+update transactions as t
+set date  = v.date,
+    value = v.value from (
+      values (1, '2023-04-01'::date, 10),
+             (2, '2023-04-02'::date, 20),
+             (3, '2023-04-03'::date, 30)
+    ) as v(id, date, value)
+where t.id = v.id;
+```
+
+|  quantity | method            |       time seconds |
+|----------:|-------------------|-------------------:|
+|     1.000 | UpdateMassive3Job |              1,00s |
+|     1.000 | UpdateMassive4Job |              0,08s |
+|     1.000 | UpdateMassive5Job |              0,06s |
+|    10.000 | UpdateMassive3Job |             14,00s |
+|    10.000 | UpdateMassive4Job |              0,73s |
+|    10.000 | UpdateMassive5Job |              0,59s |
+|   100.000 | UpdateMassive3Job |   (2m 44s) 164,00s |          
+|   100.000 | UpdateMassive4Job |              8,00s |      
+|   100.000 | UpdateMassive5Job |              7,00s |
+| 1.000.000 | UpdateMassive3Job | (27m 10s) 1630,00s |              
+| 1.000.000 | UpdateMassive4Job |    (1m 15s) 75,00s |              
+| 1.000.000 | UpdateMassive5Job |             58,00s |