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and Databases"],"sub_categories":["Candid implementations"],"readme":"## ICSQLite\nICSQLite is a cloud SQLite database on Internet Computer and provides SDK for developers to use. \nOur goal is to help developers quickly migrate web2 applications to Internet Computer. \n\n\n## Usage\n\nIn your Cargo.toml:\n\n```toml\n[dependencies]\nic-sqlite = \"0.1.0\"\n```\n\n## Limitations \u0026 Suggestions\nLimited by the total number of cycles of a call, if the number of rows retrieved by a single SQL query exceeds a certain amount, the call will crash.\n\n#### SQL statement suggestions\n* Strictly follow the rules of database optimization\n* Index building must be an empty table\n* Where query must be filtered for primary key or index field\n* Less use NOT,!=,\u003c\u003e,!\u003c,!\u003e NOT EXISTS, NOT IN, NOT LIKE, OR, they will ignore the index and cause a full table scan\n\n#### [Performance benchmarks for SQL commands](https://github.com/froghub-io/ic-sqlite/tree/main/examples/bench)\n| SQL \u003cbr/\u003e commands | performance counter \u003cbr/\u003e 1w single table data | performance counter \u003cbr/\u003e 10w single table data | performance counter \u003cbr/\u003e 50w single table data | performance counter \u003cbr/\u003e 100w single table data |\n|----------------------------------|------------------------------------------------|-------------------------------------------------|-------------------------------------------------|--------------------------------------------------|\n| create table | 1194347 | 1433766 | 2565609 | 4066020 | \n| create index \u003cbr/\u003e (empty table) | 884588 | 1122419 | 2241730 | 3601724 |\n| count | 209847 | 2995943 | 15183853 | 30392494 | \n | insert | 350256 | 349635 | 351731 | 355381 | \n| select \u003cbr/\u003e (where primary key) | 265363 | 265960 | 265345 | 268112 | \n| select \u003cbr/\u003e (where index field) | 312389 | 314594 | 314666 | 319276 | \n| select \u003cbr/\u003e (where like field) | 178263088 | 1784671532 | limit for single message execution | limit for single message execution | \n| update \u003cbr/\u003e (where primary key) | 385492 | 389192 | 391599 | 394111 | \n| update \u003cbr/\u003e (where index filed) | 239384 | 237908 | 237993 | 240998 | \n| delete \u003cbr/\u003e (where primary key) | 429190 | 259541 | 419615 | 423064 |\n\n## [IC Canister Simple example usage](https://github.com/froghub-io/ic-sqlite/tree/main/examples/backend)\n\n## Data migration suggestions \u0026 Debugging\n* Provide an interface for executing sql statements with super-management authority\n* Export standard sql statements for offline data and upload in batches\n* Debugging Get the data by running the sql statement through the super-management 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