Query generators producing sequences of SQL statements are embedded in many applications. As the response time of such sequences is often far from optimal, their optimization is an important issue. CGO (Coarse-Grained Optimization) is an appropriate optimization approach that applies rewrite rules to...
SQL*Plus User's Guide and Reference for information on the SQL*Plus RECOVER command AUTOMATIC Specify AUTOMATIC if you want Oracle to automatically generate the name of the next archived redo log file needed to continue the recovery operation. If the LOG_ARCHIVE_DEST_n parameters are defined, ...
SQL Statements: ALTER CLUSTER to ALTER SEQUENCE, 18 of 18 ALTER SEQUENCE Purpose Use theALTERSEQUENCEstatement to change the increment, minimum and maximum values, cached numbers, and behavior of an existing sequence. This statement affects only future sequence numbers. ...
SQL CREATESEQUENCETest.CountBy1STARTWITH1INCREMENTBY1; GO B. 建立以 1 遞減的順序 下列範例會從 0 開始,並且每次使用時遞減一。 SQL CREATESEQUENCETest.CountByNeg1STARTWITH0INCREMENTBY-1; GO C. 建立以 5 遞增的順序 下列範例會建立每次使用時遞增 5 的順序。
SQL CREATESEQUENCETest.CountBy1STARTWITH1INCREMENTBY1; GO B. 创建按 1 递减的序列 以下示例从 0 开始,每次使用时递减 1。 SQL CREATESEQUENCETest.CountByNeg1STARTWITH0INCREMENTBY-1; GO C. 创建按 5 递增的序列 以下示例创建一个每次使用时增加 5 的序列。
This statement can be embedded in an application program or issued through the use of dynamic SQL statements. It is an executable statement that can be dynamically prepared only if DYNAMICRULES run behavior is in effect for the package (SQLSTATE 42509). ...
CURRVAL is a system function of Oracle and is not implicitly supported by GaussDB(DWS). To support this function, DSC creates a CURRVAL function in the PUBLIC schema. The PUBLIC.CURRVAL function is used in the migrated statements. If MigSupportSequence is set to true, CURRVAL is migrated to...
We specify that we want to use the sequence and the NEXTVAL function in the INSERT INTO statements in the following order: INSERT INTO USER_TABLE VALUES (SEQ_USER.NEXTVAL, 'Washington', 'George'); INSERT INTO USER_TABLE VALUES (SEQ_USER.NEXTVAL, 'Jefferson', 'Thomas'); ...
The escape sequence must be at the end of the SQL statement. For multiple SQL statements in a command string, the escape sequence needs to be at the end of each relevant SQL statement. Function handling The JDBC driver supports function escape sequences in SQL statements with the following sy...
·VALUESclause ofINSERTstatements · TheSELECTlist of aSELECTstatement · TheSETclause of anUPDATEstatement CURRVALandNEXTVALcannot be used in these places: 不能用于以下场景 · A subquery 子查询 · A view query or materialized view query 视图或物化视图查询 ...