SOLAS公约对集合地点规定之一是集合地点应选择在容易从起居和工作场所到达的地方。
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扑救砖木结构建筑火灾内攻时应该怎样预防砸伤和摔伤事故?射水时应注意哪些问题?
User A executes the following command to update the TRANS table) SQL> UPDATE B.trans SET tr_amt=tr_amt+500 WHERE c_code=’C005’; Before user A issues a COMMIT or ROLLBACK command, user B executes the following command on the TRANS table: SQl> ALTER TABLE trans MODIFY (tr_type VARCHAR2 (3)); What would happen in this scenario?()
A. The transaction for user A is rolled back.
B. The ALTER TABLE command modifies the column successfully.
C. The ALTER TABLE command fails due to the resource being busy.
D. The ALTER TABLE command waits until user A ends the transaction.