Recent questions tagged SQL

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - MySQL disable & enable keys

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206 views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - What is semi-join in database?

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248 views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - MYSQL syntax not evaluating not equal to in presence of NULL

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250 views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql server - Compare dates in T-SQL, ignoring the time part

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229 views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql server - How can I insert binary file data into a binary SQL field using a simple insert statement?

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241 views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - The ORDER BY clause is invalid in views, inline functions, derived tables, subqueries, and common table expressions

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1.0k views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql server - Is it possible to use `SqlDbType.Structured` to pass Table-Valued Parameters in NHibernate?

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633 views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - Show all duplicated rows

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198 views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - Why are aggregate functions not allowed in where clause

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480 views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - Mysql count performance on very big tables

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364 views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - How do NULL values affect performance in a database search?

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272 views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - PostgreSQL JOIN with array type with array elements order, how to implement?

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234 views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - ActiveRecord find_each combined with limit and order

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330 views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql server - Random record from a database table (T-SQL)

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219 views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql server - SQL INSERT INTO from multiple tables

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179 views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - Do I need to create indexes on foreign keys on Oracle?

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249 views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - What is the meaning of SELECT ... FOR XML PATH(' '),1,1)?

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214 views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - Historical / auditable database

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173 views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql server - What are the differences between Merge Join and Lookup transformations in SSIS?

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385 views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - ORA-01652: unable to extend temp segment by 128 in tablespace SYSTEM: How to extend?

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325 views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - Database in use error with Entity Framework 4 Code First

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186 views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql server - MySQL - Meaning of "PRIMARY KEY", "UNIQUE KEY" and "KEY" when used together while creating a table

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258 views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - Should I commit or rollback a read transaction?

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320 views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql server - Update multiple columns in SQL

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221 views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - Is this a good way to model address information in a relational database?

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2.6k views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql server - What are row, page and table locks? And when they are acquired?

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295 views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - How to check the existence of a row in SQLite with Python?

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215 views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - How to check if field is null or empty in MySQL?

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260 views 1 answer

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