sql server update multiple columns

Label:Find the maximum value for multiple columns in one row in a SQL Server table Sometimes we need to find the largest value from multiple identical joins (the same data type for these columns) and show Here is an example IF(obj

Tags: http technology present tar comma Ace SEL Reference codeToday to change to the old man's code, actually put multiple IDs in a column, or use the comma partition ... What do you do when you inquire???Search the internet for half a day, finally found a SQL Server inside there is a parsename function, you can press. (dot) to split the string,So I wrote down th

Label:Let's take a look at the example below: Table tables Field 1 Field 2 ID Name 1 A 2 b 3 C 4 C 5 b The library structure is probably like this, this is just a simple example, the actual situation will be much more complex. For example, if I want to use a single statement to find all the data that name does not repeat, then you must Use distinct to remove redundant duplicate records. The results from the select DISTINCT name from table are: ---------- Name AC It seems to be working, but what

Original Structure Column1 column2 --------------------- 1 1 B 2 C 2 D 2 E 3 F Query results:Column1 column2 ----------------------------- 1 A, B 2 C, D, E 3 F Concatenate column2 of column1 rows into one column.I wonder how to describe this usage. Is there a mature professional title for cross-table and cross-table related conventions?Can it also be called another cross-table?This requirement should be common. There are also many demos on the Internet, which are now simple to implement for refe

Existing table table1, four int field f1,f2,f3,f4, now query to get the maximum value in the four column and only need to return the maximum value Method One: Select Case if F12>f34 then F12 else F34 end as Maxnum to (Select Case when F1>f2 then F1 else F2 end as F12 , case when F3>f4 then F3 else F4 end as F34 to table1) as T1 ORDER BY maxnum Desc The effect is as follows: Method Two: Select top 1 * "from" ( select F1 as Maxnum, ' F1 ' as ColumnName from TABLE1 UNION SELECT F2

The data table contains a column of data, as shown in 1: Figure 1 data table Now we need to divide the data in this column into three columns. The SQL code is as follows: 1, SelectMax (case when F1 % 3 = 1 then F1 else 0 end),Max (case when F1 % 3 = 2 then F1 else 0 end) B,Max (case when F1 % 3 = 0 then F1 else 0 end) cFrom hlr151Group by (F1-1)/3 Effect: 2, SelectC1 = A. F1, C2 = B. F1, C3 = C.

SQL Server triggers enable simultaneous addition, deletion, and update of multiple tables Definition: What is a trigger? In SQL Server is a certain operation of a table, triggering certain conditions, thus executing a program. A

I think a lot of people know that in Oracle, stored procedures can be passed in an array (such as int[]), that is, you can pass multiple records to the data to update together. Reduce the number of requests to the database. But what about SQL Server? Bulk INSERT This is a lot of people know, I also know, but unfortunat

Tags: SQL Server duplicateenvironment : Windows Server 2003 sp2,sql Server 2000, software for managing fixed assets.Failure phenomena:To increase the fixed asset information for two Cisco switches at the same time, the serial number is different because the model is identica

I have two tables, all of which are mobile phone numbers. Table A contains Table B. The col001 columns of both tables are mobile phone numbers, Table B of column col002 is a number and table A is 0. To compare the two tables, as long as the mobile phone number of Table B in Table A is used, Then, the number corresponding to col002 in Table B is automatically updated to col002 in table A. How can we use update