Oracle 查询表注释以及字段注释 --表字段信息 select * from all_tab_columns a where a.TABLE_NAME='T_X27_USER'; --表注释信息 select * from user_tab_comments a where a.table_name='T_X27_USER';…
项目过程中发现在Oracle中调用ArcSDE的st_astext函数返回ST_Geometry类型字段的WKT文本有时空间类型前缀没有返回,例如一个点的经度为113.4,纬度为30.6,调用st_astext函数正常返回就应该是“POINT(113.4 30.6)”,但有时返回的是“(113.4 30.6)”,缺少POINT前缀,以下real_st_astext函数可解决该问题. create or replace function real_st_astext(geom1 in clob)…
Description The Oracle/PLSQL TO_CHAR function converts a number or date to a string.将数字转换为日期或字符串 Syntax TO_CHAR( value [, format_mask] [, nls_language] ) Parameters or Arguments Value A number or date that will be converted to a string. format_mask O…
Description The Oracle/PLSQL COUNT function returns the count of an expression. The COUNT(*) function returns the number of rows in a table that satisfy the criteria of the SELECT statement, including duplicate rows and rows containing null values in…
Description The Oracle/PLSQL NVL function lets you substitute a value when a null value is encountered. NVL函数是当出现空值时替换一个值 Syntax NVL( string1, replace_with ) String1 The string to test for a null value. replace_with The value returned if string1 is n…
如题:安装CodeSmith5.2版本,SQLServer没有任何问题,而Oracle就只能获取列的注释而不能获取表的注释,经过多方面查找资料后找到了一个最重要的解决方案,Sql语句,如下:select * from user_tab_comments这句Sql语句的作用就是查询系统中所有表的注释,而我们只需要加入条件就可以查询到注释,代码如下: //获得表的注释,Oracle专用 public string GetTableDescription(){ string result=""…
https://andreynikolaev.wordpress.com/2010/10/28/appetizer-for-dtrace/ Appetizer for DTrace Filed under: DTrace,Latch — andreynikolaev @ 3:33 pm To discover how the Oracle latch works, we need the tool. Oracle Wait Interface allows us to explore the…
