sql

问题 I have a query like: DECLARE @tmpValue SET @tmpValue = 0 -- it will be change SELECT * FROM Animal WHERE AniActive = 1 UNION IF @tmpValue > 0 SELECT * FROM Animal WHERE.Active = 0 When I use like this it is giving error because of if condition. I have to use UNION because of our structure. How can I use it with if condition? Thanks, John 回答1: Move the condition @tmpValue > 0 to the WHERE clause like so: SELECT * FROM Animal WHERE AniActive = 1 UNION SELECT * FROM Animal WHERE @tmpValue > 0

问题 I have a query like: DECLARE @tmpValue SET @tmpValue = 0 -- it will be change SELECT * FROM Animal WHERE AniActive = 1 UNION IF @tmpValue > 0 SELECT * FROM Animal WHERE.Active = 0 When I use like this it is giving error because of if condition. I have to use UNION because of our structure. How can I use it with if condition? Thanks, John 回答1: Move the condition @tmpValue > 0 to the WHERE clause like so: SELECT * FROM Animal WHERE AniActive = 1 UNION SELECT * FROM Animal WHERE @tmpValue > 0

问题 I need to calculate an euclidean distance in a sqlite database. Does anyone know how to calculate square roots in sqlite beside writing and loading a dynamic library for math functions? I am close to resorting to the fast inverse square root algorithm in here http://en.wikipedia.org/wiki/Fast_inverse_square_root though it might to turn into more fun than I need right now. And as a side note, it'd be great to figure out how to do power (which is the generalized question, and is cleaner coding

问题 How this SQL query can be translated to Django ORM statement? SELECT field1, field2, field3 FROM table1 WHERE field1 NOT IN (SELECT 2_field1 FROM table2); Kindly help! :) ps table1 and table2 not bounded with ForeignKey or ManyToMany 回答1: Using two QuerySets, as shown in the docs. inner_qs = table2.objects.all() results = table1.objects.exclude(field1__in=inner_qs) 来源： https://stackoverflow.com/questions/14105660/select-values-which-not-in-another-table-with-django

问题 How this SQL query can be translated to Django ORM statement? SELECT field1, field2, field3 FROM table1 WHERE field1 NOT IN (SELECT 2_field1 FROM table2); Kindly help! :) ps table1 and table2 not bounded with ForeignKey or ManyToMany 回答1: Using two QuerySets, as shown in the docs. inner_qs = table2.objects.all() results = table1.objects.exclude(field1__in=inner_qs) 来源： https://stackoverflow.com/questions/14105660/select-values-which-not-in-another-table-with-django

问题 I have several tables that already exist in my database. Some of them have quite a few columns. I want to make some stored procedures to do a merge statement with these tables. To do that I would like the parameter of the stored procedure to be a User Defined Table type. I can go script out each table and modify it to a User Defined Table Type Creation statement. But what I would really like is a way to generate a user defined table type off an existing table in my database. I could then add

问题 I have several tables that already exist in my database. Some of them have quite a few columns. I want to make some stored procedures to do a merge statement with these tables. To do that I would like the parameter of the stored procedure to be a User Defined Table type. I can go script out each table and modify it to a User Defined Table Type Creation statement. But what I would really like is a way to generate a user defined table type off an existing table in my database. I could then add

问题 In pgadmin3, I would like to use parameterized queries (to faster debugging, just copy & paste the query from my php file). But I haven't found an option to add the values of the $1 , $2 ... parameters. Is it possible? This is the query I'm building in a loop, following the suggestion for NULL testing from here: SELECT EXISTS(SELECT 1 FROM tax WHERE (addby=$1 or addby<>$1) AND (adddate=$2 or adddate<>$2) AND ($3 IS NULL AND nome IS NULL OR nome=$3) AND ($4 IS NULL AND rank IS NULL OR rank=$4)

问题 Hi Friends I have to join 4 tables in SQL Server and need to Show Specific Coulmns in Data Grid View First Table : emp_details Second Table : tbl_designation Third Table : tbl_empcontribution Forth table : tbl_empdeduction Columns need to show in Data Grid View is 1.From First Table i need to show emp_id, emp_name , emp_pf 2.from Second Table i need to show designation_name 3.from third Table i need to show pfacc1 and pfacc2 4.From Fourth Table i need to show pf_percent and pf_max Try to

问题 Hi Friends I have to join 4 tables in SQL Server and need to Show Specific Coulmns in Data Grid View First Table : emp_details Second Table : tbl_designation Third Table : tbl_empcontribution Forth table : tbl_empdeduction Columns need to show in Data Grid View is 1.From First Table i need to show emp_id, emp_name , emp_pf 2.from Second Table i need to show designation_name 3.from third Table i need to show pfacc1 and pfacc2 4.From Fourth Table i need to show pf_percent and pf_max Try to