则系统会将这些行标记为'MULTI'。如果不需要这样做，请将count（*）更改为count（DISTINCT CODE）。
这就是条件嵌套在 CASE WHEN 语句中的应用。 【4.案例分析】 我们以部门 ID 为 1 的员工为例,根据部门 ID 为 1 的条件,我们再根据基本工资计算奖金。假设某个员工 ID 为 1,部门 ID 为 1,基本工资为 5000,则根据上述 SQL 代码,该员工的总收入为: ``` total_income = basic_salary * 0.1 = 5000 ...
If key-expression invokes the JSON_VAL function, the function invocation must meet the following conditions: The invocation of the JSON_VAL function must be the outermost expression for key-expression. If the first argument is a column, that column must be contained in a table in a partition-...
Specifies that Db2 will generate a value for the column when a row is inserted unless a value was specified for the column on the data change statement. If a user-supplied value is specified for a ROWID column, Db2 uses the value only if both of the following conditions are true: ...
Using emulation can improve performance because the SQL statement that is formulated by the emulation is less complex than the SQL statement that is formulated using getColumns(). The argument to getColumns() must evaluate to a single table. If it does not, because of a wildcard or null ...
就目前而言,NYear.ODA 是支持 SQL 语法最完整的 C# ORM 组件;对于分库分表、或分布式数据库也留有很好的扩展空间。分页、动态添加条件、子查询、无限连接查询、Union、Group by、having、In子查询、Exists、Insert子查询、Import高速导入都不在话下,递归查询、case when、Decode、NullDefault、虚拟字段、数据库function...
就目前而言,NYear.ODA 是支持 SQL 语法最完整的 C# ORM 组件;对于分库分表、或分布式数据库也留有很好的扩展空间。分页、动态添加条件、子查询、无限连接查询、Union、Group by、having、In子查询、Exists、Insert子查询、Import高速导入都不在话下,递归查询、case when、Decode、NullDefault、虚拟字段、数据库function...
When keying in the DBMS_GOLDENGATE_AUTH command, the entire string after EXEC is without spaces or line breaks. Host01 - Linux SQL> CREATE USER src_user01 IDENTIFIED BY Welcome1; User created. SQL> CREATE USER trg_user01 IDENTIFIED BY Welcome1; User created. SQL> CREATE USER oggadm ...
88 © 2006 GET DIAGNOSTICS GET DIAGNOSTICS statement Returns SQL error and diagnostic information and can be performed for the entire statement each condition (when multiple conditions occur) Enables more diagnostic information to be returned than can be contained in SQLCA SQL error message tokens ...
For example, you could map your MyDB database to the schema MyDB of your SQL Server database. Note: In SQL Server, schemas are not necessarily linked to a specific user or login ID, and one server can contain multiple databases. 2. Migrate security items:...