db2 with写法在DB2 中,WITH 子句可以用于创建公共表表达式(CTE),这些表达式可以在主 查询中重复使用,以提高查询的可读性和性能。以下是一个使用 WITH 子句的示例: sql 复制代码 WITH cte_example AS ( SELECT column1, column2 FROM table1 WHERE condition ) SELECT * FROM cte_example WHERE column1 = '...
In Sybase we frequently use temp. tables and stored procedure when we need to get a result from many tables. For example, DB2 中的临时表可以一个SQL表示(当然这只是一种,你可以创建session的临时表): with query1 ( col1, col2, col3, ..., colN) as ( select ... ), query2 (col, .....
WITH JTAB(JSCHEMA,JNAME) AS (VALUES(TABLE_SCHEMA(CAST(? AS varchar(128)), CAST(? AS varchar(128))), TABLE_NAME (CA --# SET FREQUENCY 122 WITH VTYPED (NAME, SCHEMA) AS (VALUES(TABLE_NAME (CAST(? AS varchar(128)), CAST(? AS varchar(128))), TABLE_SCHEMA(...
example 4: define the table function from example 4 with auditing. create function deptemployees (deptno char(3)) returns table (empno char(6), lastname varchar(15), firstname varchar(12)) language sql modifies sql data no external action deterministic begin atomic insert into audit values (u...
The workstation application uses the SQL CONNECT statement to create a conversation withDb2. Db2creates aDb2thread to process SQL requests. The SQL statement CALL tells theDb2server that the application is going to run a stored procedure. The calling application provides the necessary parameters. ...
FOR EACH ROW MODEDB2SQL Insert into zjt_tables1 values(substr(o.tabschema,1,8),substr(o.tabname,1,10)) 8. 建立唯一性索引 CREATE UNIQUE INDEX I_ztables_tabname ON zjt_tables(tabname); 9. 查看表 select tabname from tables where tabname='ZJT_TABLES'; ...
Example: db2advis -d test_db -a user/password -i D:\temp\sql_2.txt > D:\temp\sql_2_result_db2advis.txt 1. db2数据库中通常出现消耗时间成本很高的sql语句,耗时长的sql语句会长时间占用各种资源,如CPU, Memory, 事务日志等,增加其他sql语句的等待时间,导致整个数据库性能变差。因此我们会时刻监控性...
以分号;作结束符###JXBI_js1:/db2home/mart796>db2 -t(c) Copyright IBM Corporation 1993,2002Command Line Processor for DB2 SDK 8.2.5You can issue database manager commands and SQL statements from the commandprompt. For example:db2=>connect to sampledb2=>bind sample.bndFor general help, ...
with no intervening data types. For example: CREATE PROCEDURE SUBWOOFER() … No two identically-named procedures within a schema are permitted to have exactly the same number of parameters. A duplicate signature raises an SQL error (SQLSTATE 42723). For example, given the statements: CREATE PROC...
The following example shows a Db2 Client connection string that uses integrated security: Data Source=MyDb2DB;Integrated Security=yes; For more information, see Connect to Db2. Reconnect to Db2 Your connection to the database server stays active until you close the project. When you reopen the ...