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[英]How to insert identity value in Oracle using Entity Framework using a sequence
[英]How to insert 2 queries with sequence in oracle?
我有两个查询:
INSERT INTO CLASS
(TEACHER_ID, CLASS,)
VALUES (:i_teacher_id, :i_class)
INSERT INTO TEACHER_INFO
(TEACHER_ID, TEACHER_NAME) VALUES (:i_teacher_id, :i_teacher_name)
Teacher_id按如下顺序递增:t0001,t0002,t0003 ... etc
然后我尝试这样做:
INSERT INTO TEACHER_INFO
(TEACHER_ID, TEACHER_NAME) VALUES (teacher_seq.nextval, :i_teacher_name)
但是序列给我的只是“ 4”而不是t0004
如果Teacher_id必须采用这种格式,并且必须作为insert语句的一部分进行构造,则可以执行以下操作:
INSERT INTO TEACHER_INFO
(TEACHER_ID, TEACHER_NAME)
VALUES ('t'||LPAD(teacher_seq.nextval, 4, '0'), :i_teacher_name)
也就是说,添加初始的“ t”,然后将下一个序列号填充到带有零的4位数字之后。
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