为什么当col1包含空值时返回.? CONCAT(NULLIF([COL1],''),'.')
我有3列,我需要与之间有时列包含一个空白值的.来连接。在这种情况下,尾部.不应连接在一起。我使用哪些功能? col1 col2 col3
A 1 x
B 2
预计业绩: A.1.X
B.2
测试代码: DECLARE @tbl TABLE(a varchar(100),b var
我正在处理OCR'd pdf文件并从中提取文本并从中创建数据框,我得到的是矢量,我无法将它们连接到一行,以便它可以作为列添加到数据框。从这个块的代码,我提取列数据框我 chk_words=c("Swimming pool","Gym","west","para")
tp_big=c("swimming pool in a farm","gym","west","north","south")
请参阅下面的代码片段: DROP TABLE IF EXISTS PROJECT_DETAILS;
CREATE TABLE PROJECT_DETAILS
(
PROJECT_NAME NVARCHAR(20),
PROJECT_TYPE NVARCHAR(20),
TOTAL_HOURS INT
);
INSERT INTO PROJECT_DETAILS