; close cursor tab_exists. Checks ALL_SEQUENCES to see if a sequence of a given name exists. CREATE SEQUENCE schema.seq_name MINVALUE 1 INCREMENT BY 1 START WITH 1 CACHE 1000 ORDER; GRANT SELECT ON schema.seq_name TO user_name; I just bought your book "expert one on one" . ORA-02289: sequence does not exist START WITH 1 -- 从1开始计数. PostgreSQL Sequence SCENARIO 2: CREATE TABLE … To alter the owner, you … . You would do it almost word for word exactly like you said it. With EXISTS, it’s true if … ORA-04016: "Sequence No Longer Exists" … The DROP SEQUENCE statement allows you to remove a sequence from the database. Description An EXISTS condition tests for existence of rows in a subquery. As an example, if the current value is 6, and the current value needs to be set to 1, call NEXTVAL 5 times as follows: SELECT. If at least one row returns, it will evaluate as TRUE. Oracle … Usage. Oracle CREATE NAMESPACE Statement - docs.oracle.com CREATE SEQUENCE IF NOT EXISTS ; Also, why is the conditional drop not documented anywhere in the most recent documentation online? Code language: SQL (Structured Query Language) (sql) In this example, the persons table has three columns: person_id, first_name, and last_name.. 2. When a process requires a value from a sequence and the sequence is not available, it is created and then a sequence.nextval is executed. This statement is returning a ORA-04016 - Sequence no longer exists. I need to be able to run an Oracle query which goes to insert a number of rows, but it also checks to see if a primary key exists and if it does, then it skips that insert.
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