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How do I create a foreign key in SQL Server?
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create table question_bank
(
question_id uniqueidentifier primary key,
question_exam_id uniqueidentifier not null,
question_text varchar(1024) not null,
question_point_value decimal,
constraint fk_questionbank_ex...
Rails migration for has_and_belongs_to_many join table
How do I do a script/generate migration to create a join table for a has_and_belongs_to_many relationship?
6 Answers
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Word-wrap in an HTML table
...d to wrap text in div s and span s. However, it doesn't seem to work in table cells. I have a table set to width:100% , with one row and two columns. Text in columns, although styled with the above word-wrap , doesn't wrap. It causes the text to go past the bounds of the cell. This happens on F...
“Incorrect string value” when trying to insert UTF-8 into MySQL via JDBC?
...base_name CHARACTER SET = utf8mb4 COLLATE = utf8mb4_unicode_ci; # For each table: ALTER TABLE table_name CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci; # For each column: ALTER TABLE table_name CHANGE column_name column_name VARCHAR(191) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci...
mysql check collation of a table
How can I see what collation a table has? I.E. I want to see:
5 Answers
5
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Alter MySQL table to add comments on columns
I have been checking the MySQL Documentation for ALTER TABLE and it does not seem to include a way to add or modify a comment to a column. How can I do this?
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Get size of all tables in database
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SELECT
t.NAME AS TableName,
s.Name AS SchemaName,
p.rows,
SUM(a.total_pages) * 8 AS TotalSpaceKB,
CAST(ROUND(((SUM(a.total_pages) * 8) / 1024.00), 2) AS NUMERIC(36, 2)) AS TotalSpaceMB,
SUM(a.used_pages) * 8 AS UsedSpaceK...
How do you return the column names of a table?
How would I return the column names of a table using SQL Server 2008? i.e. a table contains these columns- id, name, address, country and I want to return these as data.
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What's the best way to join on the same table twice?
This is a little complicated, but I have 2 tables. Let's say the structure is something like this:
5 Answers
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Cannot simply use PostgreSQL table name (“relation does not exist”)
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From what I've read, this error means that you're not referencing the table name correctly. One common reason is that the table is defined with a mixed-case spelling, and you're trying to query it with all lower-case.
In other words, the following fails:
CREATE TABLE "SF_Bands" ( ... );
SEL...