PRINT_TABLE 列以行形式显示 在sqlplus,如果列比较多,往往会显示不够清晰,这时如果能把查询语句行转列就明了多了,在网上看到print_table存储过程:里面所设置的日期格式,可根据自己习惯修改 1CREATEORREPLACEPROCEDUREPRINT_TABLE(P_QUERYINVARCHAR2) AUTHIDCURRENT_USERIS2L_THECURSORINTEGERDEFAULTDBMS_SQL.OPEN_CURSOR...
存储过程接受两个参数:SQL语句和日期,还使存储过程可以使用role 权限 createorreplaceprocedureprint_table(p_queryinvarchar2,p_date_fmtinvarchar2default'DD-MM-YY HH24:MI:SS')--this utility is designed to be installed ONCE in a database and used--by all. Also, it is nice to have roles enabl...
DECLARE@sqlNVARCHAR(MAX); SET@sql='SELECT * FROM '+@tableName; PRINT @sql; 这个例子展示了如何使用print语句输出动态SQL语句。在某些场景下,我们可能需要拼接字符串来构建动态SQL语句,可以使用print语句输出构建好的SQL语句,以便我们检查和调试。在这个例子中,我们将表名变量@tableName拼接到SELECT语句中,并使用...
安装了SQL Prompt5后,会在SqlServer中添加名为SQL Prompt5的菜单,该菜单中的Snippet Manager可以对代码片段进行管理,比如在表中添加一个字段时先判断是否存在该字段,如存在先删除,然后再添加,代码如下: IF EXISTS ( SELECT 1 FROM dbo.syscolumns WHERE [name] = 'columnName' AND id = OBJECT_ID('tableName'...
procedure print_table ( p_query in varchar2, p_date_fmt in varchar2 default 'dd-mon-yyyy hh24:mi:ss' ) -- this utility is designed to be installed ONCE in a database and used -- by all. Also, it is nice to have roles enabled so that queries by ...
...我理解一些工具是方便了我们日常的工作需求,但同时由于其封装了一些细节,因此若只是知道用法,不知道实现原理,对于个人来说,浪费了一次锻炼的机会,因为往往这些经典的工具,蕴含着一些可以借鉴的逻辑,以及设计思想...这个工具是一个存储过程,print_table,用于格式化打印SQL结果,我们看下常规检索v$database视图的效果,...
Write core file on error; used in debugging. --database=dbname,-ddbname Name of the database in which the table is found. The default value isTEST_DB. --descending,-z Sorts the output in descending order. This option can be used only in conjunction with the-o(--order) option. ...
(Supported in all NDB releases based on MySQL 8.0) --core-file Write core file on error; used in debugging REMOVED: 8.0.31 --database=name, -d name Name of database in which table is found (Supported in all NDB releases based on MySQL 8.0) ...
## 步骤二:构造更新数据的SQL语句 根据需求,构建一个UPDATE SQL语句,用于修改指定记录的字段值。例如,如果要更新表`your_table`中ID为特定值的记录,修改其`column1`和`column2`的值,可以编写如下SQL语句: ```python update_query = """ UPDATE your_table ...
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