Functions That Set or Get Session Format Function Syntax Deterministic @@DATEFIRST @@DATEFIRST Nondeterministic SET DATEFIRST SET DATEFIRST {number |@number_var } Not applicable SET DATEFORMAT SET DATEFORMAT {format |@format_var } Not applicable @@LANGUAGE @@LANGUAGE Not applicable SET LANGUAGE SET...
Oracle SQL Developer创建数据库连接使用Oracle SQL Developer管理数据库对象首先要创建数据库连接。执行以下步骤:1.打开 Windows 资源管理器,双击 lt;pathgt;sqldevelopersq
/// d ##class(PHA.TEST.SQLFunction).ToDate1() ClassMethod ToDate1() { NEW SQLCODE &sql( SELECT TO_DATE('8','MM'), TO_DATE('2018','YYYY') INTO :a,:b ) if SQLCODE '= 0 { w !,"Error code ",SQLCODE } else { w "MM format: ",a," = ",$ZDATE(a,1,,4),! w "YYY...
AI代码解释 ---Table structureforgrade---DROPTABLEIFEXISTS`grade`;CREATETABLE`grade`(`id`int(11)NOTNULLAUTO_INCREMENTCOMMENT'id',`sno`varchar(20)CHARACTERSETutf8COLLATEutf8_unicode_ciNULLDEFAULTNULLCOMMENT'学号',`courseName`varchar(20)CHARACTERSETutf8COLLATEutf8_unicode_ciNULLDEFAULTNULLCOMMENT'课程...
SQL Developer provides powerful editors for working with SQL, PL/SQL, Stored Java Procedures, and XML. Run queries, generate execution plans, export data to the desired format (XML, Excel, HTML, PDF, etc.), execute, debug, test, and document your database programs, and much more with SQL...
This topic covers the main Oracle SQL Developer concepts, and explains how to use the major SQL Developer features.
聚合merge group-by,hash group-by, window function 分布式 exchange in/out remote/distribute 集合union, except, intersect,minus 其他limit, material, subplan, expression, count 执行计划展示(EXPLAIN)-操作算子详细输出 Explain输出的第二部分是各操作算子的详细信息,包括输出表达式、过滤条件、分区信息以及各算子...
Provides conceptual and usage information about Oracle SQL Developer, a graphical tool that enables you to browse, create, edit, and delete (drop) database objects; run SQL statements and scripts; edit and debug PL/SQL code; manipulate and export data; m
Oracle currently supplies on-line manuals in HTML format. You can integrate these manuals into PL/SQL Developer's environment to provide context sensitive help during editing, compilation errors, and runtime errors. Non-PL/SQL Objects You can view, create and modify tables, sequences, synonyms,...
concat、concat_ws和format函数是可变的,因此可以把要串接或格式化的值作为一个标记了VARIADIC关键字的数组进行传递(见Section 36.4.5)。数组的元素被当作函数的独立普通参数一样处理。如果可变数组参数为 NULL,concat和concat_ws返回 NULL,但format把 NULL 当作一个零元素数组。