Is it possible to get the current value of a field, use it as a variable in a calculation, then update the field based on the result?
是否可以获取字段的当前值，将其用作计算中的变量，然后根据结果更新字段？
For example the record with the ID "1" in table1 has a value of "2"
例如，table1中ID为“1”的记录的值为“2”
SELECT table1
WHERE ID = "1"
SET RESULT to CurrentID
RESULT = CurrentID + 1;
2 个解决方案
#1
13
This will set the result column to the value of the CurrentID column (plus 1) of the same row, for any row that has an ID column that equals "1":
对于ID列等于“1”的任何行，这会将结果列设置为同一行的CurrentID列（加1）的值：
UPDATE table1
SET result = CurrentID + 1
WHERE ID = "1"
#2
4
You might try
你可以试试
Update table1 set ID = ID+1 where ID = 1
#1
13
This will set the result column to the value of the CurrentID column (plus 1) of the same row, for any row that has an ID column that equals "1":
对于ID列等于“1”的任何行，这会将结果列设置为同一行的CurrentID列（加1）的值：
UPDATE table1
SET result = CurrentID + 1
WHERE ID = "1"
#2
4
You might try
你可以试试
Update table1 set ID = ID+1 where ID = 1