sql alter column null

]+ ', [' [emailprotected]+ '],[' [emailprotected]+ '] ' + ' from [' [email protected]+ ']) p PIVOT (SUM ([' [emailprotected]+ ']) for [' [emailprotected]+ '] in (' + @sql_col + ')) as Pvt Where Pvt.hx_fzone is not null for ORDER by ' [Emailprotected]--print (@sql_str) EXEC (@sql_str) drop table #t_estimateamo Untreasondrop Table #t_ Estimateamountreasontotalend---------------------------------------------------------------------------SELECT @ end_dat

A simple SQL row-column Conversion Author: eaglet In database development, we often encounter the problem of column/column conversion, such as the following problems, three tables for departments, employees, and employees. We need to count a list similar to this. Department No. Department name total formal employee tem

Symptom: Today, when I used powerdesigner 16 to design a database, the exported SQL statement was executed in SQL Server, which was suddenly miserable, crazy, and even intended to commit suicide !!! For an error like a question, see the following SQL statement: Create Table DBO. t_call_note (ID Int Identity ( 100 , 1 ), Name

Today, in the garden, we see an example of a group by grouping multi-column statistics, and we'll share it with you:CREATE TABLE Tests (year datetime year to Year,type char (1), value int);ALTER TABLE tests ALTER COLOMN year INT;INSERT into tests values (2015,1,100);INSERT into tests values (2015,2,200);INSERT into tests values (2016,1,150);INSERT into tests valu

Label:Purpose: To merge multi-line values of the same condition into the same column. 1. Create a Test table: CREATE TABLE [dbo].[tb_01]( [SN] [nvarchar]( -)NULL, [Step_name] [nvarchar]( -)NULL, [sdate] [datetime] NULL ) on [PRIMARY] 2. Insert the test data: INSERT intoTb_01VALUES('V000001','FQC','2015-01

', GETDATE (), 0.5)--INSERT into dbo. Product VALUES (NEWID (), ' Eggs ', GETDATE (), 0.5)--INSERT into dbo. Product VALUES (NEWID (), ' Pork ', GETDATE (), 25.8)--INSERT into dbo. Product VALUES (NEWID (), ' Pork ', GETDATE (), 25.8)--INSERT into dbo. Product VALUES (NEWID (), ' Pork ', GETDATE (), 25.8)--INSERT into dbo. Product VALUES (NEWID (), ' Pork ', GETDATE (), 25.8)--INSERT into dbo. Product VALUES (NEWID (), ' Pork ', GETDATE (), 25.8)--INSERT into dbo. Product VALUES (NEWID (), ' Po

Label:Build table: CREATE TABLE Studentinfo ( Name varchar, subject varchar (+), score number (3,1)); Insert Record: INSERT into studentinfo values (' Zhang San ', ' language ', 69); INSERT into studentinfo values (' Zhang San ', ' math ', 70); INSERT into studentinfo values (' John Doe ', ' language ', 20); The records inside are: The result we want is: The following SQL can be implemented: Select a name, Max (A1) language, Max (A2) Math from ( Se

Tags: des style blog http io cti ar htmlHow to specify a description for a column when creating a table with an SQL statement. The sp_addextendedproperty is used primarily for this stored procedure.Grammar sp_addextendedproperty[@name =] {' property_name '}[, [@value =] {' V Alue '} [, [@level0type =] {' Level0_object_type '} , [@ Level0name =] {' Level0_object_name '} [, [@lev

The Code is as follows:EXEC sp_rename 'table name. [original column name] ', 'new column name', 'column'Transact-SQL referenceSp_renameChange the name of the user-created object (such as a table, column, or user-defined data type) in the current database.SyntaxSp_rename [@ objname =] 'object _ name ',[@ Newname =] 'new

Create a tableCREATE TABLET2 (Stu_nameCHAR(5), COURSECHAR(5), MARKINT not NULL)INSERT intoT2VALUES('Cheng Nan','Ma Zhe', -)INSERT intoT2VALUES('Cheng Nan','Mathematics', $)INSERT intoT2VALUES('Cheng Nan','English', -)INSERT intoT2VALUES('Cheng Nan','language', -)INSERT intoT2VALUES('John Doe','Ma Zhe', A)INSERT intoT2VALUES('John Doe','Mathematics', the)INSERT intoT2VALUES('John Doe','English', the)INSERT intoT2VALUES('John Doe','language', t

constraint, deleteIFEXISTS (SELECT*FromsysobjectsWHERE Name=' Pk_stuno 'and Xtype=' PK ')Alter TABLE StuinfoDrop Constraint Pk_stunoGo--Re-add the primary KEY constraint Pk_stunoALTER TABLE StuinfoADD CONSTRAINT Pk_stunoPRIMARY KEY(Stuno)Go--Example 3 to add a unique UQ constraint (unique Constraint)--a unique constraint Uq_stuno exists, the deletionIFEXISTS (SELECT*FromsysobjectsWHERE Name=' Uq_stuid 'and Xtype=' UQ ')

How to specify the description for columns when creating a table using SQL statements. It mainly uses the sp_addextendedproperty stored procedure. Syntax sp_addextendedproperty[ @name = ] { 'property_name' }[ , [ @value = ] { 'value' } [ , [ @level0type = ] { 'level0_object_type' } , [ @level0name = ] { 'level0_object_name' } [ , [ @level1type = ] { 'level1_object_type' } , [ @level1name = ] { 'level1_object_name' } [ , [ @level2ty

Reading directory I. Preface Ii. First Thought Iii. Second Thought 4. The third thought I. Preface In some of our projects, we often encounter the problem of converting rows into columns. Now let's discuss how we can convert Table 1 to table 2 format. Figure 1 Figure 2 Ii. First Thought As you can see, table 2 columns are converted from the data rows in table 1, and only the name column is the

Declare @IdentityTable sysname,@IdentityColumn sysname,@TotalRows int,@i int,@Iden int,@Sql varchar (4000)SET NOCOUNT on--Identity ListCreate Table #IDENTITY_Table(Seqid_int int identity (+),identity_table sysname NULL,Identity_column sysname NULL,Identity_max int NULL default (0))Create Table #IDENTITY_Table_Column_Va

Typical examplesFirst, row to column1. Create a formIF object_id ('TB') is not NULL DROP table tbgocreate table TB (name VARCHAR (Ten), Course VARCHAR (Ten), fractional INT) insert into TB VALUES ('Zhang San','language', About) insert INTO TB VALUES ('Zhang San','Mathematics', the) insert INTO TB VALUES ('Zhang San','Physical', the) insert INTO TB VALUES ('John Doe','language', About) insert INTO TB VALUES ('John Doe','Mathematics', -) insert INTO TB

SQL queries the Table Name and description table field (column) Information in the MySql database, sqlmysql The following describes how to use an SQL query statement to obtain the name of a table in a Mysql database, table description, field ID, field name, data type, length, precision, whether it can be null, default

Tags: img different val sql2005 blog int section bar GESRequirements: By grouping, the contents of multiple records are combined into one, the effect is as follows: Database Example: CREATE TABLE [T2] ([NID] [bigint] null,[district] [nvarchar] (255) null,[town] [nvarchar] (255) NULL); INSERT into T2 values (1, ' Huai area ', ' Cao Lao Ji Zhen '); INSERT into T2

Error Message Description the server encountered an internal error () that prevented it from fulfilling This Request. exceptionorg. springframework. Web. util. nestedservletexception: Request Processing failed; Nested exception is org. springframework. JDBC. uncategorizedsqlexception: sqlmapclient operation; uncategorized sqlexception For SQL []; SQL State [ Null